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Evergreen date guide

What is celebrated on March 31?

See the observances and verified observance-history milestones attached to March 31. Each observance keeps its own source and date details.

Verified history

On this date in observance history

Today in history →

Selected observance milestones connected to this date, based on reviewed sources.

2010
Institutional decision

Saint Damien de Veuster Day

Act 10 was approved March 31, 2010. The reviewed materials establish a 1982 statutory origin but do not provide the exact 1982 approval date, so the field is explicitly scoped to…

2010
Later action

Saint Damien de Veuster Day

Amended HRS §8-8 to replace the Father Damien DeVeuster Day name with Saint Damien de Veuster Day after Damien’s canonization.

2009
First observance

International Transgender Day of Visibility

An April 2009 report describes the first international observance as held March 31; Manitoba’s 2024 legislation also states Crandall-Crocker founded it on March 31, 2009. Some lat…

2007
Precursor

World Octopus Day

A TONMO community proposal for an international cephalopod day evolved through discussion into the October Cephalopod Awareness Days sequence and World Octopus Day on October 8.

1966
Institutional decision

Geologist Day

Rosnedra gives 31 March 1966 as the decree date.

1920
First observance

Oranges and Lemons Day

St Clement Danes states that 31 March 1920 was the date of the first Oranges and Lemons Service for parish children.

About this date

What this date contains

5 observances

Each observance is shown once in this view, with its own source and scope details available on the guide page.

0 repeat predictably

0 use a fixed annual date and 0 follow a reusable calendar rule.

0 are edition-specific

These dates are shown only for the year or edition that has been confirmed.

1 have a country-specific scope

Country-specific observances are not presented as worldwide events.

5 have in-depth guides

These pages include reviewed meaning, history, activities, facts and FAQs.

Reviewed depth

Other in-depth guides on March 31

Source-backedFixed AnnualIn-depth guide

Anesthesia Tech Day

31 March · Anesthesia technology profession / ASATT recognition day

ASATT’s official event material places Anesthesia Tech Day on 31 March in both its 2026 and 2027 scheduling, supporting a stable March 31 professional-recognition date.

Source-backedFixed AnnualIn-depth guide

International Transgender Day of Visibility

31 March annually · International LGBTQ community observance / GLAAD reference

GLAAD identifies International Transgender Day of Visibility on 31 March and describes it as observed each year.

Source-backedFixed AnnualIn-depth guide

National Crayon Day

31 March · Creative arts / Crayola first-party recognition

Crayola’s current craft resources identify March 31 as National Crayon Day and provide dedicated activities for the observance.

Source-backedFixed AnnualIn-depth guide

National Farm Workers Day

31 March · United States / farm-worker recognition observed through public proclamations

Public proclamations and government education material recognize National Farm Workers Day on March 31, including a 2026 Colorado resolution and local proclamation language describing annua…

Source-backedFixed AnnualIn-depth guide

World Backup Day

31 March · Independent global data-backup and digital-preservation awareness campaign / March 31; not a legal or cybersecurity compliance standard

The active World Backup Day first-party site verifies March 31, describes an origin on Reddit among concerned users, maintains current stewardship, and explains that the date was chosen as…

Explore the mix

Topics represented on March 31

All topics →
Workplace, Professions & Appreciation 2Arts, Entertainment & Lifestyle 2Community, Causes & Advocacy 1
5 observances

All observances on this date

Source-backedFixed AnnualIn-depth guide

Anesthesia Tech Day

31 March · Anesthesia technology profession / ASATT recognition day

ASATT’s official event material places Anesthesia Tech Day on 31 March in both its 2026 and 2027 scheduling, supporting a stable March 31 professional-recognition date.

Source-backedFixed AnnualIn-depth guide

International Transgender Day of Visibility

31 March annually · International LGBTQ community observance / GLAAD reference

GLAAD identifies International Transgender Day of Visibility on 31 March and describes it as observed each year.

Source-backedFixed AnnualIn-depth guide

National Crayon Day

31 March · Creative arts / Crayola first-party recognition

Crayola’s current craft resources identify March 31 as National Crayon Day and provide dedicated activities for the observance.

Source-backedFixed AnnualIn-depth guide

National Farm Workers Day

31 March · United States / farm-worker recognition observed through public proclamations

Public proclamations and government education material recognize National Farm Workers Day on March 31, including a 2026 Colorado resolution and local proclamation language describing annua…

Source-backedFixed AnnualIn-depth guide

World Backup Day

31 March · Independent global data-backup and digital-preservation awareness campaign / March 31; not a legal or cybersecurity compliance standard

The active World Backup Day first-party site verifies March 31, describes an origin on Reddit among concerned users, maintains current stewardship, and explains that the date was chosen as…

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 →