What happened to flags on 24 September
2 flags in the atlas carry this date. The sentence under each one is where that is written down, in its own article.
- Guinea-Bissau 1973
The national flag of Guinea-Bissau was adopted on the day Guinea-Bissau proclaimed its independence from Portugal on 24 September 1973.
From Flag of Guinea-Bissau on Wikipedia, as it read on 2026-08-26
- Cambodia 1993
The flag in its present form was first adopted in 1948 and readopted on 24 September 1993 following the 1993 Cambodian Constituent Assembly election and the restoration of the Cambodian monarchy.
From Flag of Cambodia 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.