Hi regisz,
Unfortunately it's not currently possible to set this kind of repeat. You're able to repeat "every month on the 1st Wednesday", or "every 2 months", but it's not possible to combine both. Sorry for any inconvenience.

Thanks for letting us know this would be helpful for you.

Thx, Brendan, I will wait for the solution :)

+1 I want this too: every 3 months on the second sunday

I want this feature, too (e.g., every month on the first Sunday)

paul_wells,
The example repeat you listed, "every month on the first Sunday", should work as expected. Hope this helps!

Strangely, although it's possible to do something like "Every second Monday" that seems to cap out at 4 -- I had hoped I could be clever and work around it with something like "every 8th Wednesday" :)

https://www.rememberthemilk.com/help/answers/basics/repeatformat.rtm

Looks possible now.

+1 It would be interesting on a yearly basis.

"Every year on the 3rd Wednesday"