What happened to flags on 11 April
2 flags in the atlas carry this date. The sentence under each one is where that is written down, in its own article.
- Serbia 1835
However, under pressure from Russian Empire and the Ottoman Empire, Prince Miloš Obrenović suspended the Sretenje Constitution in early March 1835, and it was formally abolished on 11 April 1835, which also ended the use of the flag prescribed by it.
From Flag of Serbia on Wikipedia, as it read on 2026-08-29
- Tuvalu 1997
Paeniu successfully ousted Latasi in a motion of no confidence on 18 December 1996, and the flag adopted at independence was restored on 11 April 1997, following a 7 to 5 vote in parliament.
From Flag of Tuvalu on Wikipedia, as it read on 2026-08-29
How a day gets onto this site
A flag is here because a sentence in its own English Wikipedia article puts it on this date, and that sentence is printed above. Nothing was worked out from a year, and nothing was written for the occasion. Every sentence names the article it came from and the version of that article it was read in, so you can go and check it.
The calendar is still short rather than full. A third of the year has no page here, because a flag only gets a day when a sentence in its article puts something on one, and plenty of articles never do. Nothing is invented to fill the gap.