Learn English – Since + Past Simple

grammarpast-tense

Am I allowed to use since with the past simple? here are some examples.

I forgot her since that day (since 1990)
It started raining since 3 o'clock
I didn't call him since childhood

It looks OK to me, but how about you?

I would rewrite the three sentences as

I forgot about her after that day in 1990

It started raining at 3 o'clock

I haven't called him since childhood

They are all rephrased but the last is the only one still using since, although the second sentence can be

It has been raining since 3 o'clock