Repost from Reddit: https://www.reddit.com/r/dataisbeautiful/comments/8qt94a/endianess_of_date_and_address_formats_in_europe/
On the reddit comments some user wrote the address format for Russia is wrong on this map, they use big-endian as well.
Also Hungary is the only country in Europe where we use big endianness in names, aka Eastern name order: surname first, firstname second.
Sooo. Okay. These days this chart is accurate, however 20 years ago, it was pretty customary to mark the month as a roman numeral. This idiocy of course was unique to that place. For example, 1999. XII. 07.
This was a common way to write dates... -.-