That works—at least for the date. However, the time is now displayed in AM/PM format, not in 24-hour format. Do you have any tips on how I can set the time to 24 hours?
[Edit:] I figured it out: Instead of hh:mm, I have to enter HH:mm, and then the time will be displayed in 24-hour format.
And yes, I will upgrade as soon as possible.