What Day Is It?Calendar
Special days calendar 2026–2027
Every date has a special day. Pick a month to see national and public holidays, UN international days, awareness weeks and fun days, with one line about each. The same calendar powers the What Day Is It? app, with holidays for 193 countries.
2026
2027
Where the dates come from
- Public holidays: official calendars, checked against the open-source date-holidays dataset. Moving holidays are calculated for each year.
- International days: the United Nations list of international days.
- Fun days: popular observance calendars. They are unofficial.
Found a wrong date? Email gunlerdenne.app@gmail.com. → About the calendar
Frequently asked questions
How do you choose which day to show?
On the English pages each date’s main day follows the United States first, then international days, then fun days. A few holidays from other countries are listed under “Around the world”, and the app has all of them.
Are fun days official?
No. Fun days such as National Candy Day are unofficial observances, and different calendars sometimes give different dates. We leave out a fun day when we cannot confirm its date.
Can AI assistants and developers use this calendar?
Yes. Every month is available as Markdown and JSON (for example https://whatdayisitapp.com/data/en/2026-11.json), and https://whatdayisitapp.com/llms.txt lists them all. Please link back when you cite it.
Every day is a special day.
Get today’s special day every morning. Free on iPhone.