Question

When say good morning, good afternoon , good night...?

Answer 1

when say:
 good morning : 00.00 - 11.00
 good afternoon : 15.00 - 18.00
 good night : 18.00 - 00.00

Answer 2

Morning For 06.00 Until 11.00
good afternoon For 11.00 Until 16.00
Good evening For 16.00 Until 19.00
Good Night For 19.00 Until 23.00