Source-backedFixed AnnualIn-depth guide
Evergreen date guide
What is celebrated on April 15?
For 2026, these source-backed observances resolve to Wednesday, April 15. Recurring rules can move in another year, so each record keeps its own date logic.
Curated global anchors
See the collection →Major global guides on April 15
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.
Reviewed depth
Other in-depth guides on April 15
Source-backedFixed AnnualIn-depth guide
International Wellness Day
A/RES/80/249
Explore the mix
All topics →Topics represented on April 15
15 date-resolved records
All observances on this date
Source-backedFixed Annual
Hari Perisytiharan Melaka Sebagai Bandaraya Bersejarah
Melaka state history records the Historical City declaration on 15 April 1989, while a Malaysian government calendar carries the proclamation-day observance on 15 April.
Source-backedFixed Annual
International Microvolunteering Day
Nottingham Trent University’s 2026 volunteering program identifies International Micro Volunteering Day on 15 April and describes its small-action volunteering purpose.
Source-backedFixed AnnualIn-depth guide
International Wellness Day
A/RES/80/249
Source-backedFixed Annual
Jackie Robinson Day
MLB states that every April 15 baseball honors Jackie Robinson’s legacy and that April 15 has been dedicated as Jackie Robinson Day each year since 2004; MLB also documented the 2026 league…
Source-backedEdition Specific
National American Sign Language Day
New York State hosted a 15 April 2026 event explicitly honoring National American Sign Language Day.
Source-backedFixed Annual
National Anime Day
National Today and Days Of The Year independently place National Anime Day on April 15 each year.
Source-backedRule Based Annual
National Banana Day
National Day Calendar defines National Banana Day as the third Wednesday in April and shows the rule across multiple editions.
Source-backedFixed Annual
National Glazed-Spiral Ham Day
Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Glazed-Spiral Ham Day on 15 April.
Source-backedFixed Annual
National Griper’s Day
National Today and EventGuide independently list National Griper’s Day on April 15.
Source-backedFixed Annual
One Boston Day
City of Boston mayoral proclamation
Source-backedFixed Annual
RMS Titanic sinking anniversary
NOAA records that RMS Titanic sank on 15 April 1912 after striking an iceberg in the North Atlantic.
Source-backedFixed Annual
Type 1 Diabetes Day in Honor of Jakya Monique Furtick
Observance registry documentation identifies Coreen Logan as creating the day in 2019 in honor of her daughter Jakya Monique Furtick and places it on 15 April; a second observance reference…
Source-backedFixed Annual
Universal Day of Culture under the Banner of Peace
Nicholas Roerich’s writings proposed a World/Universal Day of Culture, and the international movement dedicated to the initiative identifies 15 April as its observance.
Source-backedFixed AnnualIn-depth guide
World Art Day
Source-backedEdition Specific
Youth Homelessness Matters Day
Western Australian and Northern Territory government material recognized Youth Homelessness Matters Day in April 2026, with the Northern Territory source identifying Wednesday 15 April 2026.
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 →