Evergreen date guide

What is celebrated on May 31?

For 2026, these source-backed observances resolve to Sunday, May 31. Recurring rules can move in another year, so each record keeps its own date logic.

Date authority profile

What this date contains

10 unique authority records

The list is deduplicated at the public entity layer while retaining all research provenance behind each page.

0 stable or rule-calculated

0 fixed annual and 0 reusable rule-based records can be placed without inventing a new date.

0 edition-specific

Edition-specific dates appear only when the requested year matches the verified edition; variable and historical records remain gated.

5 explicit country-scope records

Country scope stays attached to the underlying record instead of being generalized into a worldwide observance.

1 reviewed in-depth guides

These entities add reviewed meaning, history, activities, facts and FAQs without rewriting the authority facts.

Curated global anchors

Major global guides on May 31

See the collection →

A reviewed starting point drawn from prominent global observances with strong institutional or organizer provenance. Selection does not change each record’s official status or scope.

Source-backedFixed AnnualIn-depth guide

World No Tobacco Day

31 May · WHO / international observance

WHA42.19

Explore the mix

Topics represented on May 31

All topics →

Health, Wellness & Awareness 3 Faith, Tradition & Spirituality 2 Celebrations & Social 2 Workplace, Professions & Appreciation 1 Civic, Remembrance & History 1 Animals, Nature & Environment 1

10 date-resolved records

All observances on this date

Source-backedEdition Specific

Holy Pentecost

31 May 2026 · Orthodox Church in America / 2026 Paschal calendar

OCA’s 2026 desk calendar places Pentecost on 31 May 2026.

Source-backedFixed Annual

National Fisherfolks Day

31 May · Philippines / national fisherfolk-sector recognition

Philippine Proclamation No. 261 (2000) declares May 31 of every year as National Fisherfolks Day.

Source-backedFixed Annual

National Save Your Hearing Day

31 May · United States / hearing-loss prevention awareness observance

CDC/NIOSH explicitly identifies May 31 as National Save Your Hearing Day; longstanding professional materials also use the May 31 observance.

Source-backedFixed Annual

National Smile Day

31 May · Privately founded smile/dental-awareness observance

A founder-issued press release from Compassionate Dental Care states that Dr. Tim Stirneman and Jim Wojdyla founded National Smile Day on 31 May.

Source-backedFixed Annual

National Speak in Complete Sentences Day

31 May · United States / informal language observance

National Day Calendar and National Today independently place National Speak in Complete Sentences Day on May 31 each year.

Source-backedFixed Annual

National Utah Day

31 May · United States / National Day Calendar National State Days series — Utah

National Day Calendar lists National Utah Day on 31 May. The U.S. Senate records Utah’s admission/statehood date as 4 January 1896. These are separate facts: the calendar listing is an info…

Source-backedFixed Annual

Necrotizing Fasciitis Awareness Day

31 May · United States / awareness day repeatedly recognized by state proclamations

State government proclamations in multiple years designate May 31 as Necrotizing Fasciitis Awareness Day, supporting a recurring commemorative date while not making it a federal holiday.

Source-backedEdition Specific

Trinity Sunday

31 May in 2026 · Church of England / Christian liturgical observance

Church of England daily-prayer material identifies Sunday 31 May 2026 as Trinity Sunday

Source-backedFixed AnnualIn-depth guide

World No Tobacco Day

31 May · WHO / international observance

WHA42.19

Source-backedFixed Annual

World Parrot Day

31 May · global parrot awareness and conservation observance

World Parrot Trust

How this date is built

This page is assembled from verified fixed dates, reusable recurrence rules, and target-year records whose edition matches 2026. Variable, historical or unresolved records are not silently forced onto this date.

Read the methodology →