Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA6M1AD/RTC/RDAYCNT#0x0
Day Counter
1-Day Count Counts from 0 to 9 once per day. When a carry is generated, 1 is added to the tens place.
10-Day Count Counts from 0 to 3 once per carry from the ones place.
https://github.com/cmsis-svd/cmsis-svd-data