Search folder "Email older than 3 Months"

Hi,

I’m testing eM Client and I can’t figure out how I can create a search folder with a rule “Emails older than x”.

If I create a search folder with dates, I would have to change the dates every once in a while, because they almost instantly become outdated regarding e.g. “older than x weeks”.

Can somebody help me find a solution?

Best regards
Kai