What happened to flags on 30 June
4 flags in the atlas carry this date. The sentence under each one is where that is written down, in its own article.
- Portugal 1911
However, the official decree approving this flag as the official flag was published on 30 June 1911.
From Flag of Portugal on Wikipedia, as it read on 2026-08-29
- Tanzania 1964
This combined design was adopted on 30 June 1964.
From Flag of Tanzania on Wikipedia, as it read on 2026-08-26
- Liechtenstein 1982
A design with a modified crown was adopted on 30 June 1982.
From Flag of Liechtenstein on Wikipedia, as it read on 2026-08-26
- Tunisia 1999
On 30 June 1999, the proportions and design of the flag were clarified by a special law.
From Flag of Tunisia 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.