Is it possible to say "since a month/ a year / etc. ago"?

YES ,IT IS CORRECT TO SAY"SINCE A MONTH", "SINCE A YEAR'' ETC. SINCE IS FIXED WHERE THERE IS CERTAINITY.

Of course it is possible. The real question is, "Would it be grammatically correct?".

NO. You use since with a specific point in time mentioned. For example, you could say "since October" or "since October 21" or even "since 10 o'clock this morning". Make sure to use a very SPECIFIC time reference.

Use 'for' with a period of time. Now you can say 'for a month' or 'for a year'.

While we're at it, you should use the persent perfect verb tense to show that your time frame in not finished when using FOR or SINCE. You can only use AGO when you refer to a finished PAST action, and never, ever couple it with FOR or SINCE. You may, however, use expressions with 'for' with the simple past without AGO: I went out with him for 2 months.

Examples: I've worked for many years VS I've worked since 1995.

Awkward sounding...a better option would be "It's been a month/year etc since..."

It is a little awkward, but I don't consider that it is poor grammar.
Why not say, "...for the past month..."?

of corse ,it is possible to say as above but "ago" cannot be prefixed with "since".

it sounds like you can just drop the since and go with a year ago..... or a month or so, I....... or year ago is when..

Then again I don't know how you will be using it in a sentence, best of luck.


Kathryn

What I remember since a year ago today, ....

Nothing has changed since a year ago...

yes