MAY

 
1st

May Day, Labour Day, Workers' Day, Day of the International Solidarity of Workers.

Italy - national holiday (Giorno dei Lavoratori). 

Brazil - national holiday (Dia do Trabalho). 

Switzerland - official feast of Spring. 

Czech Republic - "National Love Day" – couples tend to flock to the memorial of the poet Karel Hynek Mácha in Prague and kiss. 

Hawai'I - Lei Day

Malta - public holiday (L-Ewwel ta' Mejju (1st May Day), or Jum il-Haddiem (Worker's Day)). 

India - Maharashtra Day (Maharashtra Divas)

2nd

Poland - Flag Day, an official holiday to honour the Flag of Poland 

Spain - Madrid Day

Slovenia and Serbia - second day of Labour Day 

Iran - Teacher's Day 

Indonesia - Indonesia National Education Day 

4th

International Firefighters' Day. 

The Netherlands - Remembrance of the Dead. 

China - Youth Day (???, commemorating May Fourth Movement). 

5th

Mexico and the United States: Cinco de Mayo

Council of Europe: Europe Day. 

Portuguese-speaking countries: Day of the Lusophone. 

Albania - Martyrs' Day. 

Denmark - Liberation Day

Ethiopia - Liberation Day 

Guyana - Indian Immigration Day. 

Buddhism - Buddha's Birthday. 

Japan - Tango no Sekku (Boy's Day) or Kodomo no hi (Children's Day). 

The Netherlands - Liberation Day

Australia: - May Day. 

South Korea - Children's Day. 

7th

Russia - Radio Day (commemorating the work of Alexander Popov)

8th

South Korea - Parents' Day

9th

Armenica - Victory Day to simultaneously mark the capture of Shusha in the Karabakh War and the victorious end of World War II. 

Romania - Independence Day. 

10th

Federated States of Micronesia - Constitution Day

El Salvador, Guatemala, and Mexico - Mother's Day 

15th

Paraguay - Independence Day.

Slovenia - Day of Slovenian armed forces. 

Mexico (Día del Maestro) and South Korea (??? ?) - Teacher's Day

Palestinian communities - Nakba Day

17th

Galicia - Día das Letras Galegas (Galician Literature Day)

Norway - Norwegian Constitution Day or Syttende Mai. 

Bahá'í Faith - Feast of 'Azaamat (Grandeur)

18th

Turkmenistan - Renascence, Unity and Poetry Day of Makhtumkuli

Haiti - Flag Day

20th

Cameroon - National Day

East Timor - National Day. 

21st

Chile - Navy Day (Día de las Glorias Navales)

Colombia - Dia de la Afrocolombianidad marks the abolition of slavery 

 Montenegro - Independence Day

22nd

Republic of Yemen - National Day. 

23rd

Bahá'í Faith - Declaration of the Báb

24th

Canada - Victoria Day. In Quebec, it is known as National Patriotes Day (Journée nationale des patriotes).

Christianity - Saints Cyril and Methodius Day in Eastern Orthodox tradition. 

Bulgaria - Bulgarian Education and Culture, and Slavonic Literature Day 

Republic of Macedonia (FYROM) - Saints Cyril and Methodius, Slavonic Enlighteners' Day 

Russia - Slavonic Literature and Culture Day 

Bermuda - Bermuda Day. 

Eritrea - National Day. 

25th

Argentina - Day of May Revolution/National Day 

Chad, Liberia, Mali, Mauritania, Namibia, Zambia and Zimbabwe - African Liberation Day 

Lebanon - Liberation Day

Republic of Yugoslavia - Day of Youth 

26th

Australia - National Sorry Day 

Poland - Mother's Day 

Georgia - National Day 

27th

Judaism - Lag Ba'omer

Bolivia (Día de la Madre) and Sweden (Mors Dag) - Mother's Day

Nigeria - Children's Day

28th

Azerbaijan and Armenia - Republic Day

Philippines - National Flag Day

29th

Bahá'í Faith - Ascension of Bahá'u'llah 

Nigeria - Democracy Day 

United Kingdom - Oak Apple Day. 

30th

Trinidad and Tobago – Indian Arrival Day (National Holiday).