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5/3/27 if you are in the UK.

5/3/27 if you're in one of the ~150 countries that use date first

27/5/3 if you're in one of the ~15 countries that use year first

5/3/27 If you're in the 3 countries that use month first

Guys let's all be reasonable and write the date normally:

2003-05-27

Thanks.

ISO is the way to go.

I usually write it 2026-Mar-03 in email these days because you never know which locale people are in.