How to use the calendar
The top of the page shows Today when one or more fun holidays fall on today’s date, and a Coming up list with the next ones. Below it, the full table lists every Observance with its Date, month by month. Type a word into the Filter, such as pizza, cat or science, to show only matching days.
A few favorites
| Date | Observance | Why that day |
|---|---|---|
| 14 March | Pi Day | 3/14 matches pi, 3.14 |
| 4 May | Star Wars Day | “May the Fourth be with you” |
| 25 May | Towel Day | A tribute to Douglas Adams, author of The Hitchhiker’s Guide to the Galaxy |
| 17 July | World Emoji Day | The calendar emoji traditionally shows 17 July |
| 256th day | Programmers’ Day | 256 values fit in one byte |
| 19 September | Talk Like a Pirate Day | Started by two friends as a joke and spread worldwide |
Where fun holidays come from
Fun holidays have no single source. Many “National … Day” dates, such as days for a food or a pet, began as marketing ideas from a brand, a trade association or a publicist, and caught on once newspapers, radio and social media started mentioning them. Others grew out of fan communities: Star Wars Day and Towel Day are celebrated by fans around the world with costumes, screenings and quotes. Some are awareness days set up by charities or campaigns to draw attention to a cause.
Because nobody regulates them, the same idea sometimes has two dates, and a day called “National” in the US may be celebrated elsewhere too. Treat them as an excuse for a themed lunch, a classroom activity or a social media post, not as fixed dates in an official calendar.
Official days and fun days
A few lighthearted days have picked up official recognition. Programmers’ Day became an official professional day in Russia in 2009, and the US House of Representatives passed a resolution supporting Pi Day in 2009. UNESCO also proclaimed 14 March as the International Day of Mathematics. Still, none of them is a public holiday with a day off.
For holidays that do close offices and schools, see public holidays by country. For days proclaimed by the United Nations, see the UN international years. To count down to any date you like, use the countdown timer, or check how many days are left in the year.