1541U RTC by Torsten Kracke (Released December 12th, 2017) - This is a very handy GEOS Auto-Exec utility that will read the real-time clock on a 1541 Ultimate II / II+ or Ultimate 64 and set the time in GEOS during boot-up.  For this to work, you need to have v3.1a or newer firmware.  I tested this on an Ultimate 64 with firmware 3.10a, so I assume anything in between will work. 

Original source for this utility was www.tokra.de which was discovered from a Facebook post in the Ultimate 64 group.