2021
Later action
National Do Something Good for Your Neighbor Day
Declared May 16, 2021, as National Do Something Good for Your Neighbor Day within the City of Huntsville.
Evergreen date guide
What is celebrated on May 4?
See the observances and verified observance-history milestones attached to May 4. Each observance keeps its own source and date details.
Verified history
Today in history →On this date in observance history
Selected observance milestones connected to this date, based on reviewed sources.
2017
First observance
Firefighters’ Memorial Day
FBU’s 2018 centenary circular states that Firefighters’ Memorial Day was launched in the UK the previous year and identifies May 4 as the annual date.
2005
First observance
International Respect for Chickens Day
UPC’s April 2005 release announced the launch for May 4 and the archive documents the first annual campaign that year.
2001
Institutional decision
Vietnamese Family Day (Ngày Gia đình Việt Nam)
The Government of Vietnam document register records the decision date as 4 May 2001.
1946
First observance
Liberation Day (Bevrijdingsdag)
The National Committee timeline records the 1946 celebration on May 4 because May 5 fell on Sunday.
Reviewed depth
Other in-depth guides on May 4
Source-backedFixed AnnualIn-depth guide
Firefighters’ Memorial Day
The Firefighters Memorial Trust says Firefighters’ Memorial Day is marked each year on 4 May to remember firefighters who have died in service.
Source-backedFixed AnnualIn-depth guide
Greenery Day (Midori no Hi)
Cabinet Office of Japan verifies Greenery Day as a national holiday, its 1989 creation on April 29 and the 2005 amendment moving it to May 4 from 2007.
Source-backedFixed AnnualIn-depth guide
International Respect for Chickens Day
United Poultry Concerns identifies International Respect for Chickens Day as an annual May 4 project and traces the campaign to its 2005 launch.
Source-backedFixed AnnualIn-depth guide
May 4 Day of Remembrance
Kent State University documents an official May 4 Day of Remembrance established in 1977 and a recurring remembrance tradition that includes a candlelight walk and vigil dating to 1971.
Source-backedRule Based AnnualIn-depth guide
Melanoma Monday®
The American Academy of Dermatology states that it launched Melanoma Monday® on 1 May 1995, has observed it every year since, and holds it on the first Monday in May as the opening of its U…
Source-backedFixed AnnualIn-depth guide
National Day of Reason
The current National Day of Reason campaign and American Humanist Association identify May 4 as the annual observance date; a 2026 U.S. House resolution also recognizes May 4, 2026 without…
Explore the mix
All topics →Topics represented on May 4
9 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
Firefighters’ Memorial Day
The Firefighters Memorial Trust says Firefighters’ Memorial Day is marked each year on 4 May to remember firefighters who have died in service.
Source-backedFixed AnnualIn-depth guide
Greenery Day (Midori no Hi)
Cabinet Office of Japan verifies Greenery Day as a national holiday, its 1989 creation on April 29 and the 2005 amendment moving it to May 4 from 2007.
Source-backedFixed AnnualIn-depth guide
International Respect for Chickens Day
United Poultry Concerns identifies International Respect for Chickens Day as an annual May 4 project and traces the campaign to its 2005 launch.
Source-backedFixed AnnualIn-depth guide
May 4 Day of Remembrance
Kent State University documents an official May 4 Day of Remembrance established in 1977 and a recurring remembrance tradition that includes a candlelight walk and vigil dating to 1971.
Source-backedRule Based AnnualIn-depth guide
Melanoma Monday®
The American Academy of Dermatology states that it launched Melanoma Monday® on 1 May 1995, has observed it every year since, and holds it on the first Monday in May as the opening of its U…
Source-backedFixed AnnualIn-depth guide
National Day of Reason
The current National Day of Reason campaign and American Humanist Association identify May 4 as the annual observance date; a 2026 U.S. House resolution also recognizes May 4, 2026 without…
Source-backedFixed AnnualIn-depth guide
Remembrance Day
Nationaal Comité 4 en 5 mei documents the post-war origin of the National Remembrance tradition, the 1946 national framework, later government decisions, and the current 4 May observance wi…
Source-backedFixed AnnualIn-depth guide
Rhode Island Independence Day
Rhode Island government sources state that 4 May each year is established as Rhode Island Independence Day, commemorating the General Assembly’s 4 May 1776 Act renouncing allegiance to the…
Source-backedFixed AnnualIn-depth guide
Star Wars Day / May the 4th
StarWars.com documents May 4 as Star Wars Day and the worldwide “May the 4th” celebration.
How dates are selected
This page combines fixed annual dates, reusable calendar rules and year-specific dates confirmed for 2026. Variable or historical dates are included only when they are clearly supported.
Read the methodology →