What happened to flags on 15 October
3 flags in the atlas carry this date. The sentence under each one is where that is written down, in its own article.
- Madagascar 1958
The design was chosen by a technical commission on 15 October 1958 and officially adopted on 21 October, one day and one week after the Malagasy Republic was proclaimed, respectively.
From Flag of Madagascar on Wikipedia, as it read on 2026-08-26
- Niue 1975
The flag of Niue was adopted on 15 October 1975.
From Flag of Niue on Wikipedia, as it read on 2026-08-26
- South Korea 1997
On 15 October 1997, a precise color scheme for the flag was fixed via presidential decree for the first time.
From Flag of South Korea 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.