Can't edit with right number format

[Teresa5C12]

Can't edit a document for work. I try to change the date and the calendar change come, I touch the day and different numbers come up. When I try to change it, a pop up box appears saying wrong format. Also, when I try to change the time a box comes up saying the value doesn't match the format.

[Bernd Alheit]

Contact the creator of the form.

[Teresa5C12]

Thanks anyway, but I figured out how to do it.