What happened to flags on 23 November
3 flags in the atlas carry this date. The sentence under each one is where that is written down, in its own article.
- Vietnam 1940
The flag first appeared in the Cochinchina uprising (Nam Kỳ Khởi nghĩa) of 23 November 1940, against French rule in southern Vietnam.
From Flag of Vietnam on Wikipedia, as it read on 2026-08-29
- Niger 1959
Prior to the independence from French West Africa, the flag of Niamey was adopted by the Territorial Assembly of the Niamey Colony on 23 November 1959, shortly before the proclamation of the Republic within the French Community on 18 December 1959.
From Flag of Niger on Wikipedia, as it read on 2026-08-26
- French Polynesia 1984
The assembly approved this emblem by resolution number 84-1030 AT, in its session of November 23, 1984, in application of law number 84-820 of September 6, 1984 relating to the status of the territory of French Polynesia.
From Flag of French Polynesia on Wikipedia, as it read on 2026-08-26
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.