"Good Morning" can be used after 12 noon ?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Can the Greeting “Good Morning” be used after 12 noon, in case of first meet in a particular day?

Prasenjit Bhakat ,
313/8 Ghoradhara,
P.O. Jhargram 721507, W.B.,
India

2

No, “good morning” is only used in the morning (i.e. before noon).