In the Garmin connect mobile for IOS (version 5.7.0.24) under the Devices -> [your Garmin device] -> System -> Restore & Reset -> Device Backups section, backups are shown in US date format, irrespective of the time settings defined in the app.
ideally the time format will be respected across the app, if not, at least follow either the format defined for the device on which the application runs or the one used for the region which the user account is setup to.
