What is that?
An Arbeitszeitkalender (working hours calendar) is a document. Here, you record when and how long you worked.
This allows you to prove your working hours and show how many hours you have worked.
Where can I get it?
Here you can find examples in different languages. They show you how to document your working hours.
How does it look?
An Arbeitszeitkalender (working hours calendar) is usually a table. You can keep it digitally on a computer or mobile phone.
You can also create it yourself using pen and paper. Or you can ask BEMA (Berliner Beratungsstelle für Migration und Gute Arbeit) for a printed copy.