I have the following sentence.
The deadline for problem 2 is Sept 1st.
Moreover, since there is no class nor office time on Friday, I extend the deadline for problem 1 to Sept 1st as well.
I feel really uncomfortable with the second sentence. First of all, should I write "there is no classes nor office time" or just "class"? Also, do I need "as well" in the end of second sentence?
Moreover, if you have any other suggestion to make this sentence sounds better. Please let me know!
The thing that jumps out at me as sounding off is the use of nor. While nor isn't always used with neither, it usually is, and I think it would sound better with neither, or with or (since the "no" is a negative that carries through)
Moreover, since there is neither class nor office time...
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Moreover, since there is no class or office time...
I also agree with user3169's suggestion to change "I extend" to "I am extending".
As far as your other specific questions:
Class is perfectly fine. But if you did want to say classes, you'd have to do some other rearranging ("since there are neither classes nor office times...").
You don't need "as well" at the end, but it makes the message clearer. Without it, it seems like one of the two dates given might be incorrect, because it would be a little strange to reference the same date twice without acknowledging somehow that it is the same.
So final full sentence:
Moreover, since there is neither class nor office time on Friday, I am extending the deadline for problem 1 to Sept 1st as well.
time as used here (as class time or office time) does not refer to a specific time. So I think your example is fine with one change. Due to the continuing time reference, use "am extending":
Moreover, since there is no class nor office time on Friday, I am extending the deadline for problem 1 to Sept 1st as well.
You could say "there are no classes", but then it would conflict with "there is no office time".
