I would like to filter different times on different days. For example from Monday to Thursday only pictures from 08:00am - 05:00pm and on Friday from 08:00am to 01:00pm.

Furthermore i would like to filter different in the winter months where it gets dark earlier.

I'll thought about it, but I was not sure how to implement this UI wise. How should the user choose multiple filters etc.
That's why I decided to do one filter only which the user could then apply multiple time - for example filter first for Weekdays and a certain time period and then for the weekends with another time period.

thats only possible if you work in an own project for weekdays and in an project for weekends. If you filter (in the same project) first for weekdays at certain times, everything else will be deleted. Do you know what i mean? you can try it and will find out that it's not possible like you described.