You can update the RTC by storing values into the following SIs.
SI | Description | Values to Store |
SI 32 | Current Date - according to RTC | Store the day and month as 4 digits. For example, 0402 is February4th; 3012 is December 30th |
SI 33 | Current Year - according to RTC | Store the year. For example, 1961, or 2002. |
SI 34 | Current Day of Week - according to RTC | 1 to 7, where 1= Sunday, 7 = Saturday |