2022
First observance
Dogs in Yellow Day
My Anxious Dog describes 2022 as the first national Dogs In Yellow Day.
Evergreen date guide
What is celebrated on March 20?
See the observances and verified observance-history milestones attached to March 20. 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
World Frog Day
World Frog Day moved beyond scattered informal online references into a documented organized event and campaign communication.
2013
First observance
International Day of Happiness
United Nations records describe 20 March 2013 as the first-ever observance of the International Day of Happiness.
2012
First observance
World Frog Day
The organizer’s timeline identifies a March 20, 2012 public blog celebration as the first known distinct public use and March 20, 2017 as the first known organized World Frog Day…
2010
First observance
World Sparrow Day
The official history states that World Sparrow Day was first celebrated on 20 March 2010.
1998
Later action
Tartan Day
Designated April 6 as National Tartan Day in the United States to recognize Scottish-American contributions.
1988
First observance
International Francophonie Day
OIF-linked Jeux de la Francophonie material states the day has been celebrated every year since 1988.
Reviewed depth
Other in-depth guides on March 20
Source-backedFixed AnnualIn-depth guide
Dogs in Yellow Day
British Small Animal Veterinary Association material identifies Dogs in Yellow Day on 20 March as awareness for dogs that may need space.
Source-backedFixed AnnualIn-depth guide
French Language Day
United Nations language observance
Source-backedFixed AnnualIn-depth guide
International Day of Happiness
A/RES/66/281
Source-backedFixed AnnualIn-depth guide
International Francophonie Day
UNESCO and the Organisation internationale de la Francophonie identify March 20 as International Francophonie Day. The date commemorates the creation of the Agency for Cultural and Technica…
Source-backedFixed AnnualIn-depth guide
Journée internationale de la Francophonie
The OIF states that the Journée internationale de la Francophonie is celebrated every year around 20 March and documents the 20 March 2026 edition.
Source-backedFixed AnnualIn-depth guide
National Native HIV/AIDS Awareness Day
NIH identifies National Native HIV/AIDS Awareness Day as an annual March 20 observance first observed in 2007 and organized by the National Native HIV Network. CDC archival and organizer ma…
Explore the mix
All topics →Topics represented on March 20
14 observances
All observances on this date
Source-backedFixed AnnualIn-depth guide
Dogs in Yellow Day
British Small Animal Veterinary Association material identifies Dogs in Yellow Day on 20 March as awareness for dogs that may need space.
Source-backedFixed AnnualIn-depth guide
French Language Day
United Nations language observance
Source-backedFixed AnnualIn-depth guide
International Day of Happiness
A/RES/66/281
Source-backedFixed AnnualIn-depth guide
International Francophonie Day
UNESCO and the Organisation internationale de la Francophonie identify March 20 as International Francophonie Day. The date commemorates the creation of the Agency for Cultural and Technica…
Source-backedFixed AnnualIn-depth guide
Journée internationale de la Francophonie
The OIF states that the Journée internationale de la Francophonie is celebrated every year around 20 March and documents the 20 March 2026 edition.
Source-backedFixed AnnualIn-depth guide
National Native HIV/AIDS Awareness Day
NIH identifies National Native HIV/AIDS Awareness Day as an annual March 20 observance first observed in 2007 and organized by the National Native HIV Network. CDC archival and organizer ma…
Source-backedRule Based AnnualIn-depth guide
National Preschool Teachers Appreciation Day
Virginia Department of Education bulletins identify National Preschool Teachers Appreciation Day on March 21 in 2025 and March 20 in 2026, establishing the recurring third-Friday-in-March p…
Source-backedFixed AnnualIn-depth guide
Won’t You Be My Neighbor Day
Municipal and PBS materials tie Won’t You Be My Neighbor Day to Fred Rogers’ March 20 birthday and community acts of kindness and neighborliness.
Source-backedFixed AnnualIn-depth guide
World Behavior Analysis Day
WBADA first-party history traces the idea to Elizabeth Drago’s organizing beginning in 2019, identifies a 2020 inaugural celebration, documents the alliance’s 2021 formalization and current…
Source-backedFixed AnnualIn-depth guide
World Day of Theatre for Children and Young People
ASSITEJ International identifies 20 March as the annual World Day of Theatre for Children and Young People.
Source-backedFixed AnnualIn-depth guide
World Flour Day
The current official World Flour Day site verifies March 20, present FlourWorld Museum/Mühlenchemie stewardship and the seasonal date rationale; contemporaneous 2019 industry material ident…
Source-backedFixed AnnualIn-depth guide
World Frog Day
The current World Frog Day platform says the observance is held every year on 20 March and is organized by SAVE THE FROGS!; its own history notes earlier informal use of the date.
Source-backedFixed AnnualIn-depth guide
World Sparrow Day
The official World Sparrow Day site states that the initiative is observed annually on March 20, was initiated in 2010 by Nature Forever Society with partners, and lists March 20, 2026 for…
Source-backedFixed AnnualIn-depth guide
World Storytelling Day
A current 2026 Federal Ministry of Culture and Sports page identifies 20 March as World Storytelling Day and describes storytelling’s cultural role.
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 →