What happened to flags on 18 November
2 flags in the atlas carry this date. The sentence under each one is where that is written down, in its own article.
- Lithuania 1988
The flag was then re-adopted on 18 November 1988, about 1.5 years before the re-establishment of Lithuania's independence and almost three years before the collapse of the Soviet Union.
From Flag of Lithuania on Wikipedia, as it read on 2026-08-29
- Uzbekistan 1991
The winning design was adopted on 18 November 1991, after being selected at an extraordinary session of the Uzbek Supreme Soviet.
From Flag of Uzbekistan 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.