I'm unable to select any hour before noon when TimePickerModal is in 24-hour clock mode (e.g. locale is de).
Only hours after 12 noon can be selected. Issue can be reproduced by changing the locale prop to "de" in the Time picker sample code:
<TimePickerModal
visible={visible}
onDismiss={onDismiss}
onConfirm={onConfirm}
hours={12} // default: current hours
minutes={14} // default: current minutes
label="Select time" // optional, default 'Select time'
uppercase={false} // optional, default is true
cancelLabel="Cancel" // optional, default: 'Cancel'
confirmLabel="Ok" // optional, default: 'Ok'
animationType="fade" // optional, default is 'none'
locale="de"
/>
I've tested this with release 0.8.4 on iOS and web.
