What happened to flags on 1 December
3 flags in the atlas carry this date. The sentence under each one is where that is written down, in its own article.
- Portugal 1910
Its presentation was done on 1 December 1910, after the downfall of the constitutional monarchy on 5 October 1910.
From Flag of Portugal on Wikipedia, as it read on 2026-08-29
- Isle of Man 1932
It has been the official flag of the Isle of Man since 1 December 1932 and is based on the Manx coat of arms, which dates back to the 13th century.
From Flag of the Isle of Man on Wikipedia, as it read on 2026-08-26
- Central African Republic 1958
The flag was adopted by the Legislative Assembly of Ubangi-Shari on 1 December 1958.
From Flag of the Central African Republic 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.