Which one is correct 12:30h or 12:30' or 12:30
I often see these ways when people want to mention about time.
I know that officially are 12:30 (or 12:30 AM/PM), but is it ok for 12:30' or even 12:30h in official writing ?
Thks,
Quân

Question

Answer

In American English, only 12:30 am/pm works

Answer

There really aren't any rules - any of those would be understood. But only the first couple would be 'normal' to use, and would probably be best to avoid in formal writing.

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