Thanks all.

Point was that to achieve same goal in different products of same company I stuck in different point.
I was hoping that same built-in function would be available in both products.

Also, I see that DR has a DateAdd function, but it does not add months or years, just until days.

It is somewhat like when you have to use pbEnabled on Web but enabled_state on Windows. At least, here, you have the same functionallity, just with different name.