Yes, when it is New Year's Eve or New Year's Day. They are possessives, as in the day that belongs to a new year. If you are talking about plurals, then there is no apostrophe, like "New years are not like old years".
No. It should be New Year Party.
You would put it between the {(year's) (r and s)}.
after the t (it's) You put an apostrophe on 'its' if it's a contraction of "it is." Otherwise, 'its' has no apostrophe because that's its nature.
Put the apostrophe in mices right after s.: mices'
No apostrophe is to be putted in this sentence.
yes
Personally, no. But it's not incorrect to put the apostrophe.
"Volkswagen" doesn't require an apostrophe.
no matter what you usually have to put a period after an apostrophe because it's the end of a sentence.
Aren't- The apostrophe replaces the 'o' in this circumstance.
It depends. If you are talking about "the year's best game," there's an apostrophe. If you're talking about "two or more years," there is no apostrophe.
won't (: