littleden.blog
Evergreen date guide

What is celebrated on May 15?

For 2026, these source-backed observances resolve to Friday, May 15. Recurring rules can move in another year, so each record keeps its own date logic.

Date authority profile

What this date contains

19 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.

6 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 15

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.

Explore the mix

Topics represented on May 15

All topics →
Health, Wellness & Awareness 8Arts, Entertainment & Lifestyle 2Community, Causes & Advocacy 2Workplace, Professions & Appreciation 2Food, Drink & Hospitality 2Animals, Nature & Environment 1Relationships & Family 1Civic, Remembrance & History 1
19 date-resolved records

All observances on this date

Source-backedRule Based Annual

Bike to Work Day

Third Friday in May; 15 May 2026 · United States / League of American Bicyclists National Bike Month

The League of American Bicyclists lists Bike to Work Day on May 15, 2026 and explicitly gives the future-date rule as the third Friday in May.

Source-backedRule Based Annual

Endangered Species Day

Third Friday in May · United States conservation awareness observance

U.S. Fish & Wildlife Service

Source-backedEdition Specific

Hats for Headway

15 May in the 2026 campaign edition · Headway UK brain-injury awareness and fundraising campaign

Headway’s current 2026 material documents Hats for Headway on 15 May 2026 as a fundraising and awareness campaign supporting people affected by brain injury.

Source-backedFixed Annual

International Casinos Day

15 May · International / casino-industry observance created by Casinos.com

Casinos.com states that it established International Casinos Day in 2025 for May 15 and displays a City of Las Vegas proclamation; EventGuide independently records an every-May-15 recurrenc…

Source-backedFixed Annual

International HG Awareness Day (HGAD)

15 May · HER Foundation / hyperemesis gravidarum awareness campaign

The HER Foundation’s 2026 campaign page states that May 15 is International HG Awareness Day.

Source-backedEdition Specific

International MPS Awareness Day

15 May; 15 May 2026 verified · International MPS/ML community / National MPS Society advocacy

The National MPS Society lists May 15, 2026 as MPS Awareness Day and refers to International MPS Awareness Day in its current advocacy materials.

Source-backedRule Based Annual

International Virtual Assistants Day

Third Friday of May (15 May in 2026) · International / virtual-assistant professional recognition associated with OIVAC

The original 2006 announcement and later OIVAC materials describe International Virtual Assistants Day as the third Friday of May each year.

Source-backedFixed Annual

Kangaroo Care Day® / International Kangaroo Care Awareness Day

15 May annually; 15 May 2026 verified · Global organizer-led skin-to-skin-care awareness

The official Kangaroo Care Day site identifies May 15 as the annual global awareness initiative, founded in 2011, and publishes dedicated 2026 materials for May 15.

Source-backedFixed Annual

National Chocolate Chip Day

15 May · Informal food-calendar usage documented by Association of Nutrition & Foodservice Professionals chapter material

ANFP chapter calendar material lists National Chocolate Chip Day on May 15.

Source-backedRule Based Annual

National Defense Transportation Day

Third Friday in May annually · United States / federal patriotic and national observance framework

36 U.S.C. §120 requests an annual presidential proclamation designating the third Friday in May as National Defense Transportation Day and recognizing the importance of the U.S. transportat…

Source-backedRule Based Annual

National Pizza Party Day

Third Friday in May (15 May in 2026) · United States / informal food observance with explicit current first-party recurrence

Pizza Hut’s 2026 first-party page states that National Pizza Party Day is celebrated annually on the third Friday in May and falls on May 15 in 2026.

Source-backedFixed Annual

National Safety Dose Day

15 May · United States / informal medication-safety awareness observance

National Today and EventGuide independently place National Safety Dose Day on May 15 every year.

Source-backedFixed Annual

Peace Officers Memorial Day

15 May · United States

The White House’s 2026 proclamation states that law authorizes 15 May of each year as Peace Officers Memorial Day.

Source-backedFixed Annual

Spinal Cord Injury Awareness Day

15 May · United Kingdom / spinal-cord-injury charity coalition awareness day

Spinal Injuries Association describes SCIAD as an annual event, while Spinal Research and the UK Parliament identify 15 May 2026; earlier UK charity material also marks May 15, supporting t…

Source-backedFixed Annual

TSC Global Awareness Day

15 May annually · TSC International / TSC Alliance global awareness campaign

The TSC Alliance states that TSC International coordinates TSC Global Awareness Day each year on May 15.

Source-backedFixed Annual

Vascular Birthmarks Awareness Day

15 May · International / Vascular Birthmarks Foundation-led awareness campaign

The Vascular Birthmarks Foundation identifies May 15 as its Day of Awareness for vascular birthmarks, anomalies and related syndromes.

Source-backedFixed Annual

VBF Day of Awareness

15 May · International / Vascular Birthmarks Foundation-led awareness campaign

The Vascular Birthmarks Foundation identifies May 15 as the Day of Awareness for vascular birthmarks, anomalies and related syndromes.

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 →