Do these two sentences mean the same thing?

I can't wait for the weekend.
I can't wait till the weekend.

Question

Do these two sentences mean the same thing?

I can't wait for the weekend.
I can't wait till the weekend.

Answer

They CAN mean the same things: 1. I am very excited about the weekend OR 2. I actually cannot wait to do X, I must do X before the weekend.

Meaning #2 is more likely to be the option with "till."