The first week of the month view is missing!

Week Calendar supports Fullscreen modus, like the iOS' Photos app.

When fullscreen modus is enabled, the top and bottom bar (configurable) will show on top of the contents of the calendar, until they are dismissed by either a single finger tap or a double finger tap, depending on your settings.

The first week of the month view is hidden!

This happens when you have Fullscreen modus enabled: the top bar will fall over the contents until it is dismissed.
If you do not want this behavior, please set Settings > General > Fullscreen to OFF.