What's the difference between ごぜん and あさ for "morning"?


What's the difference between these words? Apparently they both mean "morning"
but are they interchangeable?




午{ご}前{ぜん} is used when specifying time in traditional 12-hours system (12時間制).
(See also
[here](https://ja.wikipedia.org/wiki/%E5%8D%88%E5%89%8D%E3%81%A8%E5%8D%88%E5%BE%8C).)

午{ご}前{ぜん}[８]{はち}時{じ} = 08:00 (in 24-hours system) = 08:00
[A.]{ante}[M.]{meridiem} (in 12-hours system)

午{ご}後{ご}[８]{はち}時{じ} = 20:00 (in 24-hours system) = 08:00
[P.]{post}[M.]{meridiem} (in 12-hours system)

Japan also has modern [24-hours system
(24時制)](https://ja.wikipedia.org/wiki/24%E6%99%82%E5%88%B6).

朝{あさ} is used for general meaning "the morning".

