About a great night

They are grammatically different. The first one is a fragment (no main verb), while the second is a complete clause (main verb "is"). The choice between these depends on the context. It is not clear whether you intend them as complete sentences or as phrases to be incorporated into another sentence.

Thanks. But don't they mean the same think?

I just want them as separate phrases, as quotes!

AnonymousThanks. But don't they mean the same think?I just want them as separate phrases, as quotes!

Without a full context (i.e. all the surrounding words or contextual information), it is impossible to make any judgement.

I see. Actually there is not context, I just wanted to say it alone. For example, my friend and I are talking in the morning about what we are going to do at night. Once we have finished our talk I want to say that phrase ( a great night is ahead or to come, or a great night awaits us).

I hope I have managed to clarify the subject. So what do you think. Are all of them possible?

A great night is ahead.
A great night is to come.
A great night awaits us.

These are all complete sentences.

"A great night to come" is not a complete sentence. If you say it in isolation, as if it were a sentence, then a meaning like "There's a great night to come" or something similar would probably be assumed.

Thanks. So it is always better to say things in complete sentences even short phrases, such as the three above with your corrections?

Also, is 'a great night awaits us' a complete sentence?

Thanks a lot.

Anonymous So it is always better to say things in complete sentences even short phrases, such as the three above with your corrections?

Yes, if you wish to be well understood.

AnonymousAlso, is 'A great night awaits us' a complete sentence?

Yes.

A great night– S
awaits– V
us.– O

More natural to my ear are
eg We're going to have a great night.
eg It's going to be a great night.

Than you very much dear teachers