See the observances and verified observance-history milestones attached to May 10. Each observance keeps its own source and date details.
Selected observance milestones connected to this date, based on reviewed sources.
Current prefecture material states that following Law No. 189/2021 the Romanian state has commemorated the specifically named National Independence Day each year since 2022.
FAO explicitly describes its participation in the first UN International Day of Argania on 10 May 2021.
Mexican federal-government historical material explicitly records the first celebration on 10 May 1922.
Library of Congress material identifies May 10, 1914 as the first national celebration following the 1914 congressional action.
Jarvis’s 1908 memorial observance and subsequent campaign preceded the 1914 national federal designation.
Mexico’s National Population Council documents Día de las Madres on May 10 and traces the Mexican commemoration to 1922.
The FSM Government’s Constitution Day messages identify May 10 with the coming into force of the Constitution in 1979 and continue to mark FSM Constitution Day in current government communi…
A/RES/75/262
36 U.S.C. §117 designates the second Sunday in May as Mother’s Day and requests a presidential proclamation. Library of Congress sources trace the national campaign to Anna Jarvis and the 1…
A 2026 Romanian prefecture notice states that, following Law 189/2021, the Romanian state has commemorated National Independence Day every year on 10 May since 2022.
A New York Senate resolution identifies Beverly Barna as the creator and states that National Infertility Survival Day is observed each year on the Sunday prior to Mother’s Day.
Mexico’s National Population Council documents Día de las Madres on May 10 and traces the Mexican commemoration to 1922.
The FSM Government’s Constitution Day messages identify May 10 with the coming into force of the Constitution in 1979 and continue to mark FSM Constitution Day in current government communi…
A/RES/75/262
36 U.S.C. §117 designates the second Sunday in May as Mother’s Day and requests a presidential proclamation. Library of Congress sources trace the national campaign to Anna Jarvis and the 1…
A 2026 Romanian prefecture notice states that, following Law 189/2021, the Romanian state has commemorated National Independence Day every year on 10 May since 2022.
A New York Senate resolution identifies Beverly Barna as the creator and states that National Infertility Survival Day is observed each year on the Sunday prior to Mother’s Day.
The American Public Gardens Association documents National Public Gardens Day as an annual tradition on the Friday preceding Mother’s Day weekend and records its inauguration in 2009.
ANFP chapter calendars and Seafood Nutrition Partnership material independently identify May 10 as National Shrimp Day.
National Day Calendar lists National Washington Day on May 10 as a private Washington State observance; U.S. Senate records statehood on November 11, 1889, and Washington state sources docu…
Hawaii Revised Statutes §8-8 designates May 10 as Saint Damien de Veuster Day and states that it is not a state holiday; 2010 Act 10 explicitly changed the older Father Damien DeVeuster Day…
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 →