Is the sentence grammatically correct?

Question

 I hope you had a good Sunday today.

Answer 1

Favorite Answer

Not really, you are mixing past and present in the same sentence. 

You can say:

I hope you are having a good Sunday. (this will be present tense and would not need 'today' in it)

I hope today is going well for you.

I hope you had a good Sunday. (proper past tense)

I hope your Sunday went well. (proper past tense)

Answer 2

It could be, but, if Sunday were not over, then it should be "are having" rather than "had." Yet, if Sunday were gone, then it should be "yesterday", not "today."

Answer 3

Assuming Sunday is basically over.  otherwise the person would probably still be having a good sunday.  Simple past works just fine for the recent past of uncertain limits.

Answer 4

It's redundant, you say what day it is then say today