You can say "Have a good holiday" or "Enjoy your holiday" as a general expression before the start of someone's holiday. In British English "a holiday" can mean a school break or a …
The statement sounds like it is about the holiday you just had in the past, in which case you could respond with "Thank you, I did", or "Thank you, I had a lovely holiday" If instead the statement …
We don't usually say "Happy Holiday" at other times, although there's nothing wrong with saying it. We're more likely to say, "Enjoy your holiday" or to say, "Happy _____", and name …
If its is a holiday/vacation, I go with "Enjoy your trip" or "Enjoy your holiday". If it is a business trip and I know the person really well then I might also use "Enjoy your holiday" in a jocular sense.
You can use "Happy holidays!" or "Have a good holiday." instead of "Have good holidays." because "Have good holidays" sound weird and very rarely used. Actually I didn't hear it from …
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