since and from in terms of time

[saidon]

What is the difference between since and from when you are talking in terms of time.

when is each of them used?

1. I have been calling him up since yesterday.
2. I ahve been calling him up from yesterday.

Which makes sense between two.

[Humble]

Hi, Saidon,
I think only since is correct.

[Dany]

I have been calling him up since yesterday.
I have been calling him up from 6.00pm on.

"From ..... on" is used to indicate a specified time as a starting point.
"Since" is used to express that something is in progress from then till now.