4th weekend in February evaluated wrong

[fabi003]

I tried to write a generic rule for the 4th weekend in a month, and as February needs an extra rule for this, I found that with e.g “Feb: Su[5],Su[5] -1 day 12:00-22:00” it is open on Saturday, February 29, 2020, even as there is no 5th Sunday in this year, but for example in February 2032.

https://openingh.openstreetmap.de/evaluation_tool/?EXP=Feb%3A%20Su%5B5%5D%2CSu%5B5%5D%20-1%20day%2012%3A00-22%3A00&lat=52.5321&lon=13.4012&mode=0&DATE=1582921680000#