2019
Later action
Emperor's Birthday
Changed the statutory Emperor’s Birthday date to February 23 for the current reign.
Evergreen date guide
What is celebrated on May 1?
See the observances and verified observance-history milestones attached to May 1. 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
Later action
Necrotizing Fasciitis Awareness Day
Proclaimed May 31, 2017 as Necrotizing Fasciitis Awareness Day in Alabama.
2016
Later action
Independence Day
Listed 6 August, Día de la Independencia de Bolivia, among national holidays with suspension of public and private activities.
2013
First observance
National Interpreter Appreciation Day
Contemporary April 2013 coverage says Wednesday, May 1 would be the first Interpreter Appreciation Day, and a separate April 30 post reproduces the group statement that May 1 woul…
2004
First observance
Global Love Day
The organizer states that its first Global Love Day was presented on May 1, 2004.
2002
Precursor
School Bus Driver Appreciation Day
Pennsylvania House Resolution 535 formally designated May 1, 2002 as School Bus Drivers Day. It demonstrates earlier state-level recognition but is not treated as a former date or…
1995
First observance
Melanoma Monday®
AAD says it launched Melanoma Monday® on Monday, 1 May 1995 and has observed it every year since.
1928
First observance
Child Health Day
President Calvin Coolidge’s April 28, 1928 proclamation set May 1, 1928 as Child Health Day.
Reviewed depth
Other in-depth guides on May 1
Source-backedFixed AnnualIn-depth guide
Calan Mai
Museum Wales and Wales.com identify Calan Mai on 1 May as a traditional Welsh seasonal celebration associated with the beginning of summer and regionally varied folk customs.
Source-backedFixed AnnualIn-depth guide
Constitution Day
Republic of the Marshall Islands parliamentary and diplomatic sources verify May 1 Constitution Day, the Constitution’s May 1, 1979 parliamentary commencement date, and current national-hol…
Source-backedFixed AnnualIn-depth guide
Global Love Day
The Love Foundation states that the first Global Love Day was presented on May 1, 2004 and maintains the annual observance through current 2026 material.
Source-backedFixed AnnualIn-depth guide
International Doodle Dog Day
The official International Doodle Dog Day site states that doodle dog lovers celebrate every year on May 1 and identifies Jeannie North as the founder.
Source-backedFixed AnnualIn-depth guide
International Sunflower Guerrilla Gardening Day
GuerrillaGardening.org documents International Sunflower Guerrilla Gardening Day on 1 May and says Brussels guerrilla gardeners declared it in 2007.
Source-backedFixed AnnualIn-depth guide
Keep Kids Alive Drive 25 Day
Keep Kids Alive Drive 25 identifies May 1 as KKAD25 Day and describes the 2026 observance as its 20th annual nationwide proclamation effort.
Explore the mix
All topics →Topics represented on May 1
15 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
Calan Mai
Museum Wales and Wales.com identify Calan Mai on 1 May as a traditional Welsh seasonal celebration associated with the beginning of summer and regionally varied folk customs.
Source-backedFixed AnnualIn-depth guide
Constitution Day
Republic of the Marshall Islands parliamentary and diplomatic sources verify May 1 Constitution Day, the Constitution’s May 1, 1979 parliamentary commencement date, and current national-hol…
Source-backedFixed AnnualIn-depth guide
Global Love Day
The Love Foundation states that the first Global Love Day was presented on May 1, 2004 and maintains the annual observance through current 2026 material.
Source-backedFixed AnnualIn-depth guide
International Doodle Dog Day
The official International Doodle Dog Day site states that doodle dog lovers celebrate every year on May 1 and identifies Jeannie North as the founder.
Source-backedFixed AnnualIn-depth guide
International Sunflower Guerrilla Gardening Day
GuerrillaGardening.org documents International Sunflower Guerrilla Gardening Day on 1 May and says Brussels guerrilla gardeners declared it in 2007.
Source-backedFixed AnnualIn-depth guide
Keep Kids Alive Drive 25 Day
Keep Kids Alive Drive 25 identifies May 1 as KKAD25 Day and describes the 2026 observance as its 20th annual nationwide proclamation effort.
Source-backedFixed AnnualIn-depth guide
Labor Day (Philippines)
Supreme Court E-Library / official presidential proclamation
Source-backedFixed AnnualIn-depth guide
Law Day, U.S.A.
United States Code, title 36 §113
Source-backedFixed AnnualIn-depth guide
Lei Day
State of Hawaiʻi Department of Land and Natural Resources / state law history
Source-backedFixed AnnualIn-depth guide
Loyalty Day
United States Code, title 36 §115
Source-backedFixed AnnualIn-depth guide
May Day / International Workers’ Day
The International Labour Organization marks May Day on 1 May and publishes current worker-focused material.
Source-backedFixed AnnualIn-depth guide
National Black Barber Shop Appreciation Day
National Day Archives attributes the May 1 observance to James Jean-Pierre, created in April 2021; University of Georgia Extension independently recognizes the date in community-health educ…
Source-backedFixed AnnualIn-depth guide
National Mother Goose Day
A New York State Senate resolution states that Gloria T. Delamar founded Mother Goose Day in 1987 alongside publication of Mother Goose: From Nursery to Literature and memorialized May 1 as…
Source-backedFixed AnnualIn-depth guide
National Purebred Dog Day
The American Kennel Club identifies 1 May as National Purebred Dog Day and its May 2026 Gazette explicitly celebrates the date.
Source-backedFixed AnnualIn-depth guide
National Rotate Your Beer Day
National Day Archives records National Rotate Your Beer Day on May 1 and attributes it to Superior Beverage Group, while Days Of The Year independently places it on May 1.
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 →