2023
Later action
National Caregivers Day
California chaptered a concurrent resolution recognizing February 17, 2023 as National Caregivers Day in the state; this is later state recognition, not the 2015 founding act.
Evergreen date guide
What is celebrated on March 27?
See the observances and verified observance-history milestones attached to March 27. 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.
2020
First observance
International Medical Science Liaison Day
The Society states that activities and campaigns began on March 27, 2020 and contemporary event material labels that date International MSL Day.
2015
Precursor
International Day of Commemoration and Dignity of the Victims of the Crime of Genocide and of the Prevention of this Crime
A/HRC/RES/28/34 recommended that the General Assembly designate 9 December; the General Assembly then created the International Day through A/RES/69/323 in September 2015.
2008
First observance
International Whisk(e)y Day
Whiskyfun’s contemporaneous archive documents the proposal on March 27, 2008; later Whiskyfun retrospectives identify that as the start.
1962
First observance
World Theatre Day
ITI states that World Theatre Day was first celebrated on March 27, 1962.
1941
Later action
Día de la Madre
Repealed Law 69 of 1930, so the 1930 statute is not treated as current legal authority.
Reviewed depth
Other in-depth guides on March 27
Source-backedFixed AnnualIn-depth guide
International Medical Science Liaison Day
The Medical Science Liaison Society identifies 27 March as International MSL Day, states that the first annual activities began on 27 March 2020, and explains that March 27 was chosen becau…
Source-backedFixed AnnualIn-depth guide
International Whisk(e)y Day
Established drinks-calendar and historical references place International Whisk(e)y Day on March 27; the parenthetical spelling intentionally encompasses whisky and whiskey traditions.
Source-backedFixed AnnualIn-depth guide
Quirky Country Music Song Titles Day
Wellcat’s first-party holiday calendar lists Quirky Country Music Song Titles Day on March 27; Wellcat’s preserved media coverage identifies Thomas and Ruth Roy as creators of the named day…
Source-backedEdition SpecificIn-depth guide
Wear A Hat Day
Brain Tumour Research states that Wear A Hat Day launched in 2010 and confirms Friday 27 March 2026 as its flagship fundraising day. Exact future dates remain edition-specific.
Source-backedFixed AnnualIn-depth guide
World Theatre Day
International Theatre Institute first-party material verifies that ITI initiated World Theatre Day in 1961, that it has been celebrated annually on March 27 since the first 1962 observance,…
Explore the mix
All topics →Topics represented on March 27
5 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
International Medical Science Liaison Day
The Medical Science Liaison Society identifies 27 March as International MSL Day, states that the first annual activities began on 27 March 2020, and explains that March 27 was chosen becau…
Source-backedFixed AnnualIn-depth guide
International Whisk(e)y Day
Established drinks-calendar and historical references place International Whisk(e)y Day on March 27; the parenthetical spelling intentionally encompasses whisky and whiskey traditions.
Source-backedFixed AnnualIn-depth guide
Quirky Country Music Song Titles Day
Wellcat’s first-party holiday calendar lists Quirky Country Music Song Titles Day on March 27; Wellcat’s preserved media coverage identifies Thomas and Ruth Roy as creators of the named day…
Source-backedEdition SpecificIn-depth guide
Wear A Hat Day
Brain Tumour Research states that Wear A Hat Day launched in 2010 and confirms Friday 27 March 2026 as its flagship fundraising day. Exact future dates remain edition-specific.
Source-backedFixed AnnualIn-depth guide
World Theatre Day
International Theatre Institute first-party material verifies that ITI initiated World Theatre Day in 1961, that it has been celebrated annually on March 27 since the first 1962 observance,…
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 →