What happened to flags on 17 January
2 flags in the atlas carry this date. The sentence under each one is where that is written down, in its own article.
- Bangladesh 1972
The national flag of Bangladesh, nicknamed the Lal–Sobuj, was adopted officially on 17 January 1972.
From Flag of Bangladesh on Wikipedia, as it read on 2026-08-29
- Norfolk Island 1980
The bill that became the Norfolk Island Flag and Public Seal Act 1979 was introduced to the Australian Parliament that same year and received royal assent on 17 January 1980.
From Flag of Norfolk Island 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.