The date format is linked to the regional settings of your iPad.
If you wish to change the language of your APROPLAN account on iPad, you should change your device's language. In this case, do not forget to check that the regional settings stay the same.
Open the Settings of your device
- Choose language and region
- Change your device's language
- Under "Region formats", select your region and calendar (most of the time: Gregorian).
The dates displayed on your device will now correspond to the language of your device.