April observances

global campaign held annually on the last Wednesday of April to raise awareness about the effects of noise on people's health and well-being

Annual event

New year day of Sindhi Hindus

festival celebrated in Assam

Egyptian national holiday marking the beginning of spring

Satirical holiday celebrated on 14 April

UN world day

public holiday in Syria commemorating the evacuation of French soldiers and Syria's proclamation of independence on 17 April 1946

celebration of Scottish heritage

public holiday in Odisha, India

Annual holiday commemorating the Assyrian New Year

thumb|99x99px|Artemis The Elaphebolia (; Έλαφηβόλια Elaphēbolia) was an ancient Greek festival held at Athens and Phocis during the month of Elaphebolion (March/April dedicated to Artemis Elaphebolos (deer slayer). In the town of Hyampolis in Phocis, it would have been instituted by the inhabitants to commemorate a victory against the Thessalians.

Public Holiday in Mithila region

The Noumenia (, lit: new moon) is the first day of the lunar month and also a religious observance in ancient Athens and much of Greece (cf. Attic calendar).

day honoring Indigenous Peoples in the United States

thumbnail|right|Harvesting preparation Nobanno (, Nobānno; lit: New Feast) is a Bengali harvest celebration usually celebrated with food and dance and music in Bangladesh and in the Indian states of West Bengal, Tripura, Assam's Barak Valley and Eastern parts of Jharkhand. It is a festival of food; many local preparations of Bengali cuisine like pitha are cooked.

feast day of Mark the Evangelist

Worldwide celebration of human voices

annual public holiday in Iceland

festival

annual observance to commemorate victims of the Holocaust

public holiday in Argentina

Danish holiday

is a global day of awareness celebrated on April 5, commemorating the importance of the human conscience.

Sri Lankan new year holiday

day to recognize secretaries and others

Major League Baseball event honoring Jackie Robinson

celebration day in Bilboa

type of dance

Observance in India, 24 April

thumb|Mopin festival dance thumb|Himalayan University Mopin Festival Celebration 2017

Ekadashi Tithi of Shukla Paksha of Phalgun month

national fair held in the Mexican state of Aguascalientes

annual celebration of Dalit history

Odia new year

day federal income tax returns are due in the US

annual international campaign to promote safe, healthy and decent work

A day to celebrate the founding of Scouting

semi-annual conference in Salt Lake City

group of festivals held in Dan Sai, Thailand

Singmogil or Sikmogil (, hanja: 植木日) is the Korean Arbor Day holiday celebrated annually on April 5 in South Korea.

vaishnava Festival, Appearance day of Chaitanya Mahaprabhu

public holiday in Iran commemorating the results of the March 1979 referendum

annual holiday celebrated in Castile and León, Spain

national day in the Philippines

organization

Harela is a Hindu festival celebrated in the Indian state of Uttarakhand and mainly in Mahasu region of Himachal Pradesh. This festival is very popular in the Kumaon region of Uttarakhand, and is celebrated by the name Harela. This name is used in some places of Garhwal but, it is not commonly used, as the festival is celebrated as Mol-Sankranti or as Rai-Sagrān. It is called Hariyali/Rihyali in Kangra, Shimla and Sirmaur districts, and Dakhrain in Jubbal and Kinnaur district of Himachal Pradesh.

annual sexual sssault awareness event

The Geologist's Day professional holiday, celebrated on the first Sunday of April, was established in 1966 in USSR.

is a religious festival of the northeastern state of Tripura in India.

commemoration and public holiday to mark emancipation of enslaved people

article about calenders used in Indian subcontinent and south-east Asia

East Asian festival

mela held in Haridwar, India

ancient festival in Athens

The Bizu festival is celebrated by the Chakma people in Bangladesh and India, as the traditional New Year's Day which falls around 12–14 April.

Mid-Pentecost or Midfeast, also Meso-Pentecost (from ; ) is a feast day which occurs during the Paschal season in the Eastern Orthodox Church and those Eastern Catholic Churches and Eastern Lutheran Churches that follow the Byzantine Rite.

Annual Druze pilgrimage

annual event

feast of the Annunciation, usually 25 March in the Western liturgical calendar