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Lot of Asian countries use YYYY/MM/DD like China, Japan, South Korea etc.

American software engineers use ISO8601 or RFC3339 ... I just wrote 20210108 in my journal this morning (referring to a podcast episode published yesterday).

I'll admit I might be annoying to others ... my wife is specifically irritated when I write a time in military format (but my son has no problem reading it from my phone).

I do that too, but I often replace the month with the 3 letter abbreviation to make it easier for others.

E.g. 2021JAN08.

While I believe that most (?) of Europe uses DD/MM/YYYY, I am pretty sure that most of South East Asia (dunno about India and Nepal) use YYYY/MM/DD.

> I am pretty sure that most of South East Asia (dunno about India and Nepal) use YYYY/MM/DD.

I think you might have meant East Asia. I know Japan primarily uses YYYY/MM/DD.

Singapore, Malaysia, Indonesia, Thailand, Vietnam, Cambodia, Laos, Myanmar, etc (South East Asia) conventionally use DD/MM/YYYY. Interestingly, the Philippines seems to use MM/DD/YYYY.

This looks useful: https://en.wikipedia.org/wiki/Date_format_by_country