commit 98e9b61bdd0230b89935d3cad074cacca1a15f24
Author: Ingo Korb <ingo@akana.de>
Date:   Thu Dec 11 11:54:53 2025 +0100

    fix day-of-week calculation when setting RTC with ISO time
    
    Fix the incorrect day-of-week calculation used by the T-WI command
    caused by an integer overflow.
    
    Bug found by Stefan Waigand