How to check date overlapping?

Hi,

What is the easiest/simplest way to check date overlapping?

I have date_start1, date_end1, date_start2 and date_end2, and I'd like to know if they're overlapping or not.

I searched for FM OVERLAP, but so far couldn't find one, which would help.

I've found FM TB_TIME_INTERVAL_OVERLAP, which looked promising, however I couldn't make it work, maybe I used a wrong calculation method /I tried several/.

Any idea?

Thanks in advance,

Peter