Have a nice vacation.

[tufguy]

"Have a nice vacation."

"Have a nice holiday."

"Have a nice journey."

"Have a nice weather."

"Have a nice tea."

Please check.

Could you please also tell me in how many ways or context, can this phrase "Have a nice" be used?

 

[emsr2d2]

"Have a nice tea" works only if you're referring to "tea" as the name of a specific meal. In the UK, some people still do (and of course, there's "afternoon tea", the subject of a long recent thread).

Have a nice breakfast!
Have a nice lunch!
Have a nice dinner!

Those all work. I find "Have a nice tea" unlikely, though not ungrammatical.

 

[tufguy]

That one doesn't work. The others do.

Could you please also tell me in how many ways or context, can this phrase "Have a nice" be used?

Could you please tell me something in regard to this question as well?