View source for April

{{short description|Fourth month in the Julian and Gregorian calendars}}
{{Use dmy dates|date=February 2026}}
{{about|the month}}
{{Redirect|Apr.|other uses|APR (disambiguation){{!}}APR}}
{{pp-move-indef}}
{{Calendar|year=2026}}

'''April''' is the fourth month of the year in the [[Gregorian calendar|Gregorian]] and [[Julian calendar]]s. Its length is 30 days.

April is commonly associated with the season of [[spring (season)|spring]] in the [[Northern Hemisphere]], and [[autumn]] in the [[Southern Hemisphere]], where it is the seasonal equivalent to [[October]] in the Northern Hemisphere and vice versa.

== History ==
[[File:Breviarium Grimani - April.jpg|thumb|April, Brevarium Grimani, fol. 5v (Flemish)]]
[[File:04 April - Percent of global area at temperature records - Global warming - NOAA.svg |thumb |In recent decades, the number of warm temperature records in April has outpaced cold temperature records over a growing portion of Earth's surface.<ref>{{cite web |title=Mean Monthly Temperature Records Across the Globe |url=https://www.ncei.noaa.gov/access/monitoring/monthly-report/global/202501/supplemental/page-3 |publisher=National Centers for Environmental Information (NCEI) of the National Oceanic and Atmospheric Administration (NOAA) }} Link is an example for one month; for other months, change the "202501" in the preceding URL to '''yyyymm''', where '''yyyy''' is the four-digit year and '''mm''' is the two-digit month (01=January through 12=December)</ref>]]
[[File:1850- 04 April each year - Global average temperature changes.svg |thumb |Chart shows changes in global average temperature annually in April of each year<ref>.●{{nbsp}}Source for 1850- raw data: {{cite web |title=Global Land and Ocean Temperature Anomalies |url=https://www.ncei.noaa.gov/data/noaa-global-surface-temperature/v6.1/access/timeseries/aravg.mon.land_ocean.90S.90N.v6.1.0.202602.asc |publisher=National Centers for Environmental Information (NCEI) of the National Oceanic and Atmospheric Administration (NOAA) |archive-url=https://web.archive.org/web/20260326165000/https://www.ncei.noaa.gov/data/noaa-global-surface-temperature/v6.1/access/timeseries/aravg.mon.land_ocean.90S.90N.v6.1.0.202602.asc |archive-date=26 March 2026 |url-status=live}}
<br>●{{nbsp}}Updated data is accessible through [https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/global/time-series/globe/land_ocean/tavg/1/0/1850-2026 Climate at a Glance Global Time Series / Globe / Global Time Series]. ''Choose parameters:'' Surface: Land and Ocean / Parameter: Average Temperature Anomaly / Time Scale: 1-Month / Month: All Months / Start Year: 1850 / End Year: 20__.
<br>●{{nbsp}}Technical note: data in chart is adjusted to reference period of 1850-1900 (representing pre-industrial era)</ref>]]

The Romans gave this month the [[Latin]] name {{lang|la|[[Aprilis]]}}<ref name=Chambers>"April" in ''[[Chambers's Encyclopædia]]''. London: [[George Newnes Ltd|George Newnes]], 1961, Vol.&nbsp;1, p.&nbsp;497.</ref> but the derivation of this name is uncertain. The traditional etymology is from the verb {{wikt-lang|la|aperire}}, {{gloss|to open}}, in allusion to its being the season when trees and flowers begin to "open", which is supported by comparison with the modern Greek use of {{wikt-lang|el|άνοιξη}} ({{translit|el|ánixi}}, {{gloss|opening}}) for spring. Since some of the Roman months were named in honor of divinities, and as April was sacred to the goddess [[Venus (mythology)|Venus]], her [[Veneralia]] being held on the first day, it has been suggested that Aprilis was originally her month '''Aphrilis''', from her equivalent Greek goddess name [[Aphrodite]] (''Aphros''), or the [[Etruscan language|Etruscan]] name ''[[Aphrodite|Apru]]''. [[Jacob Grimm]] suggests the name of a hypothetical god or hero, ''Aper'' or ''Aprus''.<ref>Jacob Grimm ''Geschichte der deutschen Sprache''. Cap. "Monate"</ref>

April was the second month of the earliest [[Roman calendar]],<ref name="Chisholm1911"/> before ''[[Ianuarius]]'' and ''[[Februarius]]'' were added by King [[Numa Pompilius]] about 700&nbsp;BC. It became the fourth month of the calendar year (the year when twelve months are displayed in order) during the time of the [[decemvirs]] about 450&nbsp;BC, when it was 29&nbsp;days long. The 30th day was added back during the reform of the calendar undertaken by [[Julius Caesar]] in the mid-40s&nbsp;BC, which produced the Julian calendar.

The [[Anglo-Saxons]] called April {{lang|ang|ēastre-monaþ}}. The [[Venerable Bede]] says in ''[[The Reckoning of Time]]'' that this month {{wikt-lang|ang|ēastre}} is the root of the word [[Easter]]. He further states that the month was named after a goddess ''[[Eostre]]'' whose feast was in that month. It is also attested by [[Einhard]] in his work ''[[Vita Karoli Magni]]''.

[[St George]]'s day is the twenty-third of the month; and [[St Mark]]'s Eve, with its superstition that the ghosts of those who are doomed to die within the year will be seen to pass into the church, falls on the twenty-fourth.<ref name="Chisholm1911">{{EB1911|inline=1|wstitle=April|volume=2|page=230}}</ref>

In [[History of China|China]] the symbolic ploughing of the earth by the emperor and princes of the blood took place in their third month, which frequently corresponds to April.<ref name="Chisholm1911"/> In Finnish, April is ''huhtikuu'', meaning ''[[slash-and-burn]] moon'', when [[gymnosperm]]s for beat and burn clearing of farmland were felled.

In [[Slovene language|Slovene]], the most established traditional name is ''mali traven'', the month when plants start growing. It was first written in 1466 in the [[Škofja Loka Passion Play|Škofja Loka manuscript]].<ref name="KoledarDPG2007">{{cite web|url=http://www.dobrova-polhovgradec.si/doc/priponke/koledar%20prir%2007%20zadnji.pdf |title=Koledar prireditev v letu 2007 in druge informacije občine Dobrova–Polhov Gradec |language=sl |trans-title=The Calendar of Events and Other Information of the Municipality of Dobrova–Polhov Gradec <!-- |issn=C505-5857 --> |publisher=Municipality of Dobrova-Polhov Gradec |year=2006 |url-status=dead |archive-url=https://web.archive.org/web/20131102060918/http://www.dobrova-polhovgradec.si/doc/priponke/koledar%20prir%2007%20zadnji.pdf |archive-date=November 2, 2013 }}</ref>

The month April originally had 30 days; [[Numa Pompilius]] made it 29 days long; finally, [[Julius Caesar]]'s calendar reform made it 30&nbsp;days long again, which was not changed in the calendar revision of [[Julian calendar|Augustus Caesar]] in 8&nbsp;BC. 

In [[Ancient Rome]], the festival of [[Cerealia]] was held for seven days from mid-to-late April, but exact dates are still being determined. [[Feriae Latinae]] was also held in April, with the date varying. Other ancient Roman observances include [[Veneralia]] (April 1), [[Megalesia]] (April 10–16), [[Fordicidia]] (April 15), [[Parilia]] (April 21), [[Vinalia|Vinalia Urbana]] (April 23), [[Robigalia]] (April 25), and [[Serapia]] (April 25). [[Floralia]] was held April 27 during the [[Roman Republic|Republican era]], or April 28 on the [[Julian calendar]], and lasted until May 3. However, these dates do not correspond to the modern [[Gregorian calendar]].

The [[Lyrids]] [[meteor shower]] appears on April 16 – April 26 each year, with the peak generally occurring on April 22. The [[Eta Aquariids]] meteor shower also appears in April. It is visible from April 21 to May 20 each year, with peak activity on or around May 6. The [[Pi Puppids]] appear on April 23, but only in years around the parent comet's [[perihelion]] date. The [[Virginids]] also shower at various dates in April.

The "Days of April" ({{lang|fr|journées d'avril}}) is a name assigned in French history to a [[July Monarchy#April 1834 insurrections|series of insurrections]] at Lyons, Paris and elsewhere, against the government of [[Louis-Philippe of France|Louis Philippe]] in 1834, which led to violent repressive measures, and to a famous trial known as the {{lang|fr|procès d'avril}}.<ref name="Chisholm1911"/>

== Symbols ==
[[File:Diamond.jpg|alt=Faceted diamond|thumb|Faceted [[diamond]]]]April's [[birthstone]] is the [[diamond (gemstone)|diamond]]. The [[birth flower]] is the [[common daisy]] ''(Bellis perennis)'' or the [[sweet pea]].<ref>Kipfer, Barbara Ann (1997) ''The Order of Things''. New York: Random House</ref><ref>{{cite web|url=http://www.shgresources.com/gems/birthflowers/|archive-url=https://archive.today/20120911093344/http://www.shgresources.com/gems/birthflowers/|url-status=dead|archive-date=2012-09-11|title=U101 College Search}}</ref> The [[zodiac]] signs are [[Aries (astrology)|Aries]] (until 19 April) and [[Taurus (astrology)|Taurus]] (20 April onward).<ref>The Earth passed the junction of the signs at 14:45 UT/GMT on April 19, 2020, and will pass it again at 20:33 UT/GMT on April 19, 2021.</ref><ref name=astrology>{{cite web |title=Astrology Calendar |url=https://www.yourzodiacsign.com/calendar/ |website=yourzodiacsign |access-date=March 29, 2020 |archive-date=March 29, 2020 |archive-url=https://web.archive.org/web/20200329204306/https://www.yourzodiacsign.com/calendar/ |url-status=live }} Signs in UT/GMT for 1950–2030.</ref>

[[File:Daisy ntgr.JPG|alt=Daisy flower|thumb|[[Bellis perennis|Daisy]] flower]] [[File:Sweet Pea (27711557850).jpg|alt=Sweet pea|thumb|[[Sweet pea]]]]

== Observances ==
''This list does not necessarily imply official status or general observance.''

=== Month-long ===
[[File:Kobelwald Kirche Bild Chor.JPG|thumb|A fresco in a Catholic church in Switzerland representing the Resurrection of the Lord]]
* In [[Catholic Church|Catholic]], [[Protestantism|Protestant]] and [[Eastern Orthodox Church|Orthodox]] [[Christian tradition|tradition]], April is the Month of the [[Resurrection of Jesus|Resurrection of the Lord]]. April and March are the months in which the moveable [[Religious festival|Feast]] of [[Easter Sunday]] is celebrated.
* [[National Pet Month]] (UK)

==== United States ====
* [[Arab Americans#Arab American Heritage Month|Arab American Heritage Month]]
* Autism Awareness Month<ref>{{Cite web|url=https://www.governor.virginia.gov/newsroom/proclamations/proclamation/autism-awareness-month-and-world-autism-awareness-day.html|title=Virginia Governor - Ralph Northam - Proclamation|last=|website=www.governor.virginia.gov|language=en-US|access-date=2019-06-09|archive-date=June 9, 2019|archive-url=https://web.archive.org/web/20190609003202/https://www.governor.virginia.gov/newsroom/proclamations/proclamation/autism-awareness-month-and-world-autism-awareness-day.html|url-status=dead}}</ref><ref>{{Cite web|url=https://gov.alaska.gov/newsroom/2019/04/01/autism-awareness-month/|title=Autism Awareness Month – Michael J. Dunleavy|date=April 1, 2019|website=gov.alaska.gov|access-date=2019-06-09|archive-date=June 9, 2019|archive-url=https://web.archive.org/web/20190609003211/https://gov.alaska.gov/newsroom/2019/04/01/autism-awareness-month/|url-status=dead}}</ref><ref>{{Cite web|url=https://www.autismspeaks.org/world-autism-month|title=World Autism Month|website=Autism Speaks|language=en|access-date=2019-06-09|archive-date=June 17, 2019|archive-url=https://web.archive.org/web/20190617195239/https://www.autismspeaks.org/world-autism-month|url-status=live}}</ref>
* [[Cancer Control Month]]
* [[Community colleges in the United States|Community College]] Awareness Month
* [[Confederate History Month]] ([[Alabama]], [[Florida]], [[Georgia (U.S. State)|Georgia]], [[Louisiana]], [[Mississippi]], [[Texas]], [[Virginia]])
* [[Financial Literacy Month]]
* [[Jazz Appreciation Month]]
* [[Joint Policy Board for Mathematics|Mathematics and Statistics Awareness Month]]
* [[Military brat (U.S. subculture)|Month of the Military Child]]<ref>{{cite web|title=The Month of the Military Child |url=https://www.dodea.edu/dodeaCelebrates/Military-Child-Month.cfm |website=Department of Defense Education Activity |publisher=DoDEA |access-date=5 April 2022}}</ref><ref>{{cite web |title=Month of the Military Child |url=https://www.war.gov/Spotlights/Month-of-the-Military-Child/ |website=Department of Defense |access-date=5 April 2022 }}{{Dead link|date=May 2026 |bot=InternetArchiveBot }}</ref>
* [[National Poetry Month]]
* [[National Poetry Writing Month]]
* [[American Occupational Therapy Association|Occupational Therapy Month]]<ref>{{cite web |title=Occupational Therapy Month |url=https://www.aota.org/Conference-Events/OTMonth.aspx |website=American Occupational Therapy Association |publisher=AOTA |access-date=31 March 2020}}</ref>
* [[List of observances in the United States by presidential proclamation#Annual special months recognized by presidential proclamation|National Prevent Child Abuse Month]]
* [[National Volunteer Month]]
* [[Parkinson's Disease Foundation#Parkinson's Advocates in Research|Parkinson's Disease Awareness Month]]
* Rosacea Awareness Month<ref>{{cite web|title=National Rosacea Society designates April as "Rosacea Awareness Month" |url=https://www.mdedge.com/internalmedicine/article/162349/rosacea/national-rosacea-society-designates-april-rosacea-awareness |date=3 April 2018|publisher=Practical Dermatology|access-date=9 June 2021}}</ref><ref>{{cite web|title=Rosacea Awareness Month Focuses on Management Options |url=https://www.pharmacytimes.com/view/rosacea-awareness-month-focuses-on-management-options |date=1 April 2020|publisher=Pharmacy Times|access-date=9 June 2021}}</ref>
* [[Sexual Assault Awareness Month]]

==== United States food months ====
{{Unreferenced section|date=December 2025}}
* Fresh Florida Tomato Month
* National Food Month
* National Grilled Cheese Month
* National Pecan Month
* National Soft Pretzel Month
* National Soyfoods Month

=== Non-Gregorian ===
''(All Baha'i, Islamic, and Jewish observances begin at the sundown prior to the date listed, and end at sundown of the date in question unless otherwise noted.)''
* [[List of observances set by the Bahá'í calendar]]
* [[List of observances set by the Chinese calendar]]
* [[List of observances set by the Hebrew calendar]]
* [[List of observances set by the Islamic calendar]]
* [[List of observances set by the Solar Hijri calendar]]

=== Movable ===

==== Variable; 2021 dates shown ====
* [[Youth Homelessness Matters Day]]
* [[Public holidays in Kiribati|National Health Day]] ([[Kiribati]]): April 6
* [[Head and Neck Cancer Alliance#Oral, Head and Neck Cancer Awareness Week|Oral, Head and Neck Cancer Awareness Week]] ([[United States]]): April 13–19<ref>[https://headandneck.org/oral-head-neck-cancer-awareness-week-early-registration-now-open/]{{dead link|date=October 2021}}</ref>
* [[List of observances in the United States by presidential proclamation#Annual special weeks recognized by presidential proclamation|National Park Week]] ([[United States]]): April 18–26
* [[Crime Victims' Rights Week]] ([[United States]]): April 19–25<ref>{{cite web |url=https://ovc.ncjrs.gov/ncvrw/ |title=National Crime Victims' Rights Week |publisher=United States Department of Justice Office for Victims of Crime |access-date=November 30, 2021 |url-status=live |archive-url=https://web.archive.org/web/20100214014130/http://ovc.ncjrs.gov/ncvrw/ |archive-date=February 14, 2010 }}</ref>
* [[National Volunteer Week]]: April 19–25
* [[European Immunization Week]]: April 20–26
* [[Day of Silence]] ([[United States]]): April 24
* [[Pay it forward#1999 novel, film and subsequent projects|Pay It Forward Day]]: April 28 ([[International observance]])
* [[Denim Day]]: April 29 ([[International observance]])
* [[Day of Dialogue]] ([[United States]])
* [[Vaccination Week In The Americas]]
* See: [[List of movable Western Christian observances]]
* See: [[List of movable Eastern Christian observances]]

==== First Wednesday ====
* [[Childhelp#Community outreach|National Day of Hope]] ([[United States]])

==== First Saturday ====
* [[Ulcinj Municipality Day]] ([[Ulcinj]], Montenegro)

==== First Sunday ====
* [[Daylight saving time]] ends ([[Australia]] and [[New Zealand]])
* [[Geologists Day]] (former [[Soviet Union]] countries)
* [[Kanamara Matsuri]] ([[Kawasaki, Kanagawa|Kawasaki]], Japan)
* [[Opening Day]] ([[United States]])

==== First full week ====
* [[National Library Week]] ([[United States]])
** [[National Library Week|National Library Workers Day]] ([[United States]]) (Tuesday of National Library week, April 9 in 2024)
** [[Bookmobile#National Bookmobile Day|National Bookmobile Day]] (Wednesday of National Library week, April 10 in 2024)
* [[American Public Health Association#National Public Health Week|National Public Health Week]] ([[United States]])
* [[Association of Public-Safety Communications Officials-International#Events|National Public Safety Telecommunicators Week]] ([[United States]])

===== Second Wednesday =====
* [[International Day of Pink]]

===== Second Thursday =====
* [[National Former Prisoner of War Recognition Day]] ([[United States]])

===== Second Friday =====
* [[Public holidays in Liberia|Fast and Prayer Day]] ([[Liberia]])
* [[Public holidays in Russia#Popular holidays which are not public holidays|Air Force Day]] ([[Russia]])
* [[List of festivals and events in Kamakura#April|Kamakura Matsuri at Tsurugaoka Hachiman]] ([[Kamakura]], Japan), lasts until third Sunday.

==== Second Sunday ====
* [[Children's Day#Peru|Children's Day]] ([[Peru]])

==== Week of April 14 ====
* [[Pan American Day|Pan American Week]] ([[United States]])

==== Third Wednesday ====
* [[Administrative Professionals Day]] ([[New Zealand]])

==== Third Thursday ====
* [[National High Five Day]] ([[United States]])

==== Third Saturday ====
* [[Record Store Day]] ([[International observance]])

==== Last full week of April ====
* [[Administrative Professionals Day|Administrative Professionals Week]] ([[Malaysia]], [[North America]])
* [[World Immunization Week]]

==== Week of April 23 ====
* [[Canada Book Day|Canada Book Week]] ([[Canada]])

==== Week of the [[new moon]] ====
* [[International Dark Sky Week]] ([[United States]])

==== Third Monday ====
* [[Patriots' Day]] ([[Massachusetts]], [[Maine]], United States)
* [[Queen's Official Birthday#Other countries and territories|Queen's Official Birthday]] ([[Saint Helena, Ascension and Tristan da Cunha]])
* [[Sechseläuten]] ([[Zurich]], Switzerland)

===== Wednesday of last full week of April =====
* [[Administrative Professionals Day]] ([[Hong Kong]], [[North America]])

==== First Thursday after April 18 ====
* [[First Day of Summer]] ([[Iceland]])

===== Fourth Thursday =====
* [[Take Our Daughters and Sons to Work Day]] ([[United States]])

===== Last Friday =====
* [[Arbor Day]] ([[United States]])
* [[Día de la Chupina]] ([[Rosario]], Argentina)

==== Last Friday in April to first Sunday in May ====
* [[Arbor Day|Arbour Week]] in [[Ontario]]

===== Last Saturday =====
* [[Children's Day]] ([[Colombia]])
* [[Rebuilding Together#National Rebuilding Month|National Rebuilding Day]] ([[United States]])
* [[The Fragrance Foundation#National Sense of Smell Day|National Sense of Smell Day]] ([[United States]])
* [[World Tai Chi and Qigong Day]]

===== Last Sunday =====
* [[Flag Day]] ([[Åland]], Finland)
* [[Public holidays in Turkmenistan|Turkmen Racing Horse Festival]] ([[Turkmenistan]])

===== April 27 (April 26 if April 27 is a Sunday) =====
* [[Koningsdag]] ([[Netherlands]])

===== Last Monday =====
* [[Confederate Memorial Day]] ([[Alabama]], [[Georgia (U.S. state)]], and [[Mississippi]], United States)

===== Last Wednesday =====
* [[International Noise Awareness Day]]

=== Fixed ===
[[File:Celebrazione del 2777 Natale di Roma - Pietas Comunità Gentile 2.jpg|thumb|Celebration of the 2777th [[Natale di Roma]] at the [[Circus Maximus]]]]
* [[April 1]]
** [[April Fools' Day]]
** [[Arbor Day#Tanzania|Arbor Day]] ([[Tanzania]])
** [[Civil Service Day]] ([[Thailand]])
** [[Public holidays in Cyprus|Cyprus National Day]] ([[Cyprus]])
** [[Edible Book Day]]
** [[Fossil Fools Day]]
** [[Kha b-Nisan]] ([[Assyrian people]])
** [[National Science Day (Thailand)|National Civil Service Day]] ([[Thailand]])
** [[Odisha Day]] ([[Odisha]], India)
** Start of [[National Prostate Health Month#Related observances|Testicular Cancer Awareness week]] ([[United States]]), April 1–7
** [[Season for Nonviolence]] January 30 – April 4
* [[April 2]]
** [[International Children's Book Day]] ([[International observance]])
** [[Malvinas Day]] ([[Argentina]])
** [[List of food days#April|National Peanut Butter and Jelly Day]] ([[United States]])
** [[Thai Heritage Conservation Day]] ([[Thailand]])
** [[Unity of Peoples of Russia and Belarus Day]] ([[Belarus]])
** [[World Autism Awareness Day]] ([[International observance]])
* [[April 3]]
* [[April 4]]
** [[Children's Day]] ([[Hong Kong]], [[Taiwan]])
** [[Independence Day (Senegal)]]
** [[International observance#April|International Day for Mine Awareness and Assistance in Mine Action]]
** [[Peace Day (Angola)]]
* [[April 5]]
** [[Children's Day]] ([[Palestinian territories]])
** [[List of food days#April|National Caramel Day]] (United States)
** [[Sikmogil]] (South Korea)
* [[April 6]]
** International Asexuality Day
** [[Public holidays in Thailand|Chakri Day]] (Thailand)
** [[National Beer Day (United Kingdom)]]
** [[New Beer's Eve]] (United States)
** [[Tartan Day]] (United States & Canada)
* [[April 7]]
** [[Flag Day]] (Slovenia)
** [[Genocide Memorial Day (Rwanda)]], and its related observance:
*** [[International Day of Reflection on the 1994 Rwanda Genocide]] ([[United Nations]])
** [[Motherhood and Beauty Day]] (Armenia)
** [[National Beer Day (United States)]]
** [[Sheikh Abeid Amani Karume Day]] (Tanzania)
** [[Public holidays in Mozambique|Women's Day]] (Mozambique)
** [[World Health Day]] ([[International observance]])
* [[April 8]]
** [[Buddha's Birthday]] (Japan only, other countries follow different calendars)
** [[Feast of the Third Day of the Writing of the Book of the Law|Feast of the First Day of the Writing of the Book of the Law]] ([[Thelema]])
** [[International Romani Day]] ([[International observance]])
* [[April 9]]
** [[Anniversary of the German Invasion of Denmark]] (Denmark)
** [[Baghdad Liberation Day]] ([[Iraqi Kurdistan]])
** [[Constitution Day (Kosovo)]]
** [[Day of National Unity (Georgia)]]
** [[Day of the Finnish Language]] (Finland)
** [[Day of Valor]] or ''Araw ng Kagitingan'' (Philippines)
** [[Feast of the Second Day of the Writing of the Book of the Law]] ([[Thelema]])
** [[List of food days#Global or international|International Banshtai Tsai Day]]
** [[Martyr's Day (Tunisia)]]
** [[National Former Prisoner of War Recognition Day]] (United States)
** [[Ásatrú holidays#The Troth|Remembrance for Haakon Sigurdsson]] ([[The Troth]])
** [[Vimy Ridge Day]] (Canada)
* [[April 10]]
** [[Day of the Builder]] (Azerbaijan)
** [[Feast of the Third Day of the Writing of the Book of the Law]] ([[Thelema]])
** [[Siblings Day]] ([[International observance]])
* [[April 11]]
** [[Juan Santamaría Day]], anniversary of his death in the [[Second Battle of Rivas]]. (Costa Rica)
** [[International Louie Louie Day]]
** [[List of food days#April|National Cheese Fondue Day]] (United States)
** [[World Parkinson's Day]]
* [[April 12]]
** [[Children's Day]] (Bolivia and Haiti)
** Commemoration of first human in space by [[Yuri Gagarin]]:
*** [[Cosmonautics Day]] (Russia)
*** [[International Day of Human Space Flight]]
*** [[Yuri's Night]] ([[International observance]])
** [[Halifax Day]] ([[North Carolina]])
** [[List of food days#April|National Grilled Cheese Sandwich Day]] (United States)
** [[National Redemption Day]] (Liberia)
* [[April 13]]
** [[Jefferson's Birthday]] (United States)
** [[Coma Patients' Day|Katyn Memorial Day]] ([[Poland]])
** [[Teachers' Day#Dates by country/region|Teachers' Day]] ([[Ecuador]])
** First day of [[Thingyan]] ([[Myanmar]]) (April 13–16)
** [[Remembrance days in Slovakia|Unfairly Prosecuted Persons Day]] ([[Slovakia]])
* [[April 14]]
** [[Okinawan festivals and observances|ʔabusibaree]] ([[Okinawa Islands]], Japan)
** [[B. R. Ambedkar|Ambedkar Jayanti]] (India)
** [[Black Day (South Korea)]]
** [[Commemoration of Anfal Genocide Against the Kurds]] ([[Iraqi Kurdistan]])
** [[Dhivehi Language Day]] (Maldives)
** [[Day of Mologa]] ([[Yaroslavl Oblast]], Russia)
** [[Day of the Georgian language]] ([[Georgia (country)]])
** [[Emancipation Day|Season of Emancipation]] (April 14 to August 23) (Barbados)
** [[N'Ko Alphabet Day]] ([[Mande languages|Mande speakers]])
** [[Pohela Boishakh]] (Bangladesh)
** [[Pana Sankranti]] ([[Odisha]], India)
** [[Puthandu]] ([[Tamils]]) (India, Malaysia, Singapore, Sri Lanka)
** Second day of [[Songkran (Thailand)|Songkran]] (Thailand)
** [[Pan American Day]] (several countries in the Americas)
** The first day of [[Takayama Festival|Takayama Spring Festival]] ([[Takayama, Gifu]], Japan)
** [[Vaisakh]] ([[Punjab (region)|Punjab]]), (India and Pakistan)
** [[Youth Day (Angola)]]
* [[April 15]]
** [[Day of the Sun]] (North Korea).<ref name="SeolSongAh2015">{{Cite web|url=http://www.dailynk.com/english/read.php?cataId=nk01500&num=13620|title=Kim Jong Un's birthday still not a holiday|author=Seol Song Ah|date=7 December 2015|access-date=13 January 2017|work=Daily NK|archive-date=January 7, 2018|archive-url=https://web.archive.org/web/20180107010642/http://www.dailynk.com/english/read.php?cataId=nk01500&num=13620|url-status=live}}</ref>
** [[Hillsborough disaster#Memorials|Hillsborough Disaster Memorial]] ([[Liverpool]], England)
** [[Jackie Robinson Day]] (United States)
** [[Pohela Boishakh]] ([[West Bengal]], India) (Note: celebrated on [[April 14]] in Bangladesh)
** Last day of [[Songkran (Thailand)|Songkran]] (Thailand)
** [[Tax Day]], the official deadline for filing an individual [[Tax return (United States)|tax return]] (or requesting an extension). (United States, Philippines)
** [[Universal Day of Culture]]
** [[World Art Day]]
* [[April 16]]
** [[Birthday of José de Diego]] (Puerto Rico, United States)
** [[Birthday of Queen Margrethe II]] (Denmark)
** [[Emancipation Day]] ([[Washington, D.C.]], United States)
** [[Foursquare Day]] ([[International observance]])
** [[Memorial Day for the Victims of the Holocaust]] (Hungary)
** [[List of awareness days#April|National Healthcare Decisions Day]] (United States)
** [[Remembrance of Chemical Attack on Balisan and Sheikh Wasan]] ([[Iraqi Kurdistan]])
** [[World Voice Day]]
* [[April 17]]
** [[Evacuation Day (Syria)]]
** [[FAO Day]] (Iraq)
** [[Flag Day (American Samoa)]]
** [[Malbec World Day]]
** [[List of food days#April|National Cheeseball Day]] (United States)
** [[List of food days#Italy|National Espresso Day]] (Italy)
** [[Public holidays in Gabon|Women's Day]] (Gabon)
** [[World Hemophilia Day]]
* [[April 18]]
** [[Anniversary of the Victory over the Teutonic Knights in the Battle of the Ice, 1242]] (Russia)
** [[Army Day (Iran)]]
** [[Coma Patients' Day]] (Poland)
** [[Día del Amigo|Friend's Day]] (Brazil)
** [[Independence Day (Zimbabwe)]]
** [[International Day For Monuments and Sites]]
** [[Invention Day]] (Japan)
* [[April 19]]
** [[Army Day (Brazil)]]
** [[Beginning of the Independence Movement]] (Venezuela)
** [[History of lysergic acid diethylamide#"Bicycle Day"|Bicycle Day]]
** [[Dutch-American Friendship Day]] (United States)
** [[Holocaust Remembrance Day]] (Poland)
** [[Indigenous Peoples Day (Brazil)|Indigenous Peoples Day]] (Brazil)
** [[King Mswati III's birthday]] (Eswatini)
** [[Landing of the 33 Patriots Day]] (Uruguay)
** [[List of food days#April|National Garlic Day]] (United States)
** [[List of food days#April|National Rice Ball Day]] (United States)
** [[Primrose Day]] (United Kingdom)
* [[April 20]]
** [[420 (cannabis culture)]] (International)
** [[UN Chinese Language Day]] ([[United Nations]])
* [[April 21]]
** [[Natale di Roma]](Italy)
** [[Muster (Texas A&M University)#A. and M. Day|A&M Day]] ([[Texas A&M University]])
** [[Civil Services of India#Civil Services Day|Civil Service Day]] (India)
** [[Grounation Day]] ([[Rastafari movement]])
** [[Public holidays in Mexico#Civic holidays|Heroic Defense of Veracruz]] (Mexico)
** [[Public holidays in North Korea|Kang Pan-sok's Birthday]] (North Korea)
** [[Kartini Day]] (Indonesia)
** [[Public holidays in Russia|Local Self Government Day]] (Russia)
** [[Arbor Day#Kenya|National Tree Planting Day]] (Kenya)
** [[San Jacinto Day]] ([[Texas]])
** [[Queen's Official Birthday#Other countries and territories|Queen's Official Birthday]] ([[Falkland Islands]])
** [[Public holidays in Brazil|Tiradentes' Day]] (Brazil)
** [[Vietnam Book Day]] (Vietnam)
* [[April 22]]
** [[Discovery Day]] (Brazil)
** [[Earth Day]] ([[International observance]]) and its related observance:
*** [[International Mother Earth Day]]
** [[Holocaust Memorial Days|Holocaust Remembrance Day]] (Serbia)
** [[List of food days#April|National Jelly Bean Day]] (United States)
* [[April 23]]
** [[Castile and León Day]] ([[Castile and León]], Spain)
** [[German Apples Day|German Beer Day]] (Germany)
** [[Conch Republic|Independence Day]] ([[Conch Republic]], [[Key West, Florida]])
** [[International Pixel-Stained Technopeasant Day]]
** [[Khongjom Day]] ([[Manipur]], India)
** [[National Sovereignty and Children's Day]] (Turkey and Northern Cyprus)
** [[Navy Day (China)]]
** [[St George's Day]] (England) and its related observances:
*** [[Canada Book Day]] (Canada)
*** [[St George's Day#Catalonia|La Diada de Sant Jordi]] ([[Catalonia]], Spain)
*** [[World Book Day]]
** [[UN English Language Day]] ([[United Nations]])
* [[April 24]]
** [[Armenian Genocide Remembrance Day]] (Armenia)
** [[Concord Day]] (Niger)
** [[Children's Day (Zambia)]]
** [[Democracy Day (Nepal)]]
** [[Fashion Revolution Day]]
** [[Flag Day (Ireland)]]
** [[International Sculpture Day]]
** [[Kapyong Day]] (Australia)
** [[Labour Day#Bangladesh|Labour Safety Day]] (Bangladesh)
** [[National Panchayati Raj Day]] (India)
** [[List of food days#April|National Pigs in a Blanket Day]] (United States)
** [[Republic Day (The Gambia)]]
** [[St Mark's Eve]] ([[Western Christianity]])
** [[World Day for Laboratory Animals]]
* [[April 25]]
** [[Anniversary of the First Cabinet of Kurdish Government]] ([[Iraqi Kurdistan]])
** [[Anzac Day]] (Australia, New Zealand)
** [[Arbor Day (Germany)]]
** [[DNA Day]]
** [[Feast of Saint Mark]] ([[Western Christianity]])
** [[Flag Day (Faroe Islands)]]
** [[Public holidays in Eswatini|Flag Day (Eswatini)]]
** [[Freedom Day (Portugal)]]
** [[Liberation Day (Italy)]]
** [[Rogation Day|Major Rogation]] ([[Western Christianity]])
** [[Military Foundation Day]] (North Korea)<ref name="SeolSongAh2015"/>
** [[List of food days#April|National Zucchini Bread Day]] (United States)
** [[Parental Alienation Awareness Day]]
** [[Red Hat Society Day]]
** [[Sinai Liberation Day]] (Egypt)
** [[World Malaria Day]]
* [[April 26]]
** [[Chernobyl disaster]] related observances:
*** [[International Duties Memorial Day|Memorial Day of Radiation Accidents and Catastrophes]] (Russia)
*** [[Day of Remembrance of the Chernobyl tragedy]] (Belarus)
** [[Confederate Memorial Day]] ([[Florida]], United States)
** [[Hug A Friend Day]]
** [[Lesbian Visibility Day]]
** [[List of food days#April|National Pretzel Day]] (United States)
** [[Old Permic alphabet|Old Permic Alphabet Day]]
** [[Union Day (Tanzania)]]
** [[World Intellectual Property Day]]
* [[April 27]]
** [[Public holidays in Russia|Day of Russian Parliamentarism]] (Russia)
** [[Day of the Uprising Against the Occupying Forces]] (Slovenia)
** [[Flag Day]] (Moldova)
** [[Freedom Day (South Africa)]]
*** [[UnFreedom Day]]
** [[Independence Day (Sierra Leone)]]
** [[Public holidays in Togo|Independence Day (Togo)]]
** [[National Day]] ([[Mayotte]])
** [[National Day]] (Sierra Leone)
** [[List of food days#April|National Prime Rib Day]] (United States)
** [[Flag flying days in Finland|National Veterans' Day]] (Finland)
* [[April 28]]
** [[Lawyers' Day]] ([[Orissa, India]])
** [[Mujahideen Victory Day]] (Afghanistan)
** [[National Day]] ([[Sardinia]], Italy)
** [[National Heroes Day (Barbados)|National Heroes Day]] (Barbados)
** [[Restoration of Sovereignty Day]] (Japan)
** [[Workers' Memorial Day|Workers' Memorial Day and World Day for Safety and Health at Work]] ([[International observances|international]])
*** [[National Day of Mourning (Canada)|National Day of Mourning]] (Canada)
* [[April 29]]
** [[Day of Remembrance for all Victims of Chemical Warfare]] ([[United Nations]])
** [[International Dance Day]] ([[UNESCO]])
** [[Public holidays in Denmark#Other special days|Princess Bedike's Birthday]] (Denmark)
** [[List of food days#April|National Shrimp Scampi Day]] (United States)
** [[Shōwa Day]], traditionally the start of the [[Golden Week (Japan)|Golden Week]] holiday period, which is April 29 and May 3–5. (Japan)
* [[April 30]]
** [[Armed Forces Day]] ([[Georgia (country)]])
** [[Flag flying days in Sweden|Birthday of the King]] (Sweden)
** [[Battle of Camarón|Camarón Day]] ([[French Foreign Legion]])
** [[Children's Day]] (Mexico)
** [[Public holidays in Thailand|Consumer Protection Day]] (Thailand)
** [[Honesty Day]] (United States)
** [[International Jazz Day]] ([[UNESCO]])
** [[Martyrs' Day (Pakistan)|Martyrs' Day]] (Pakistan)
** [[May Eve]], the eve of the first day of summer in the Northern hemisphere ''(see [[May 1]])'':
*** [[Beltane]] begins at sunset in the Northern hemisphere, [[Samhain]] begins at sunset in the Southern hemisphere. ([[Neo-Druidism|Neo-Druidic]] [[Wheel of the Year]])
*** [[Carodejnice]] (Czech Republic and Slovakia)
*** [[Walpurgis Night]] (Central and Northern Europe)
** [[Persian Gulf naming dispute#National Persian Gulf Day|National Persian Gulf Day]] (Iran)
** [[Reunification Day]] (Vietnam)
** [[Public holidays in Russia#Popular holidays which are not public holidays|Russian State Fire Service Day]] (Russia)
** [[Tax return (Canada)|Tax Day (Canada)]]
** [[Teachers' Day]] (Paraguay)

== See also ==
* [[Germanic calendar]]
* [[List of historical anniversaries]]
* [[Sinking of the RMS Titanic|Sinking of the RMS ''Titanic'']]

== References ==
 {{Reflist}}

== External links ==
{{sisterlinks|d=Q118|c=Category:April|n=no|b=no|v=no|voy=April|m=no|mw=no|s=no|wikt=April|species=no}}
* [http://www.arborday.org/ National Arbor Day Foundation]

{{months}}

{{Authority control}}

[[Category:April| ]]
[[Category:Months|*04]]