Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAME51J19A/RTC/MODE2/ALARM0#0x0
HOUR=AM
MODE2_ALARM Alarm n Value
Second
Minute
Hour
0 (AM): Morning hour
16 (PM): Afternoon hour
Day
Month
Year
https://github.com/cmsis-svd/cmsis-svd-data