This is a read-write string, formatted as MM/DD/YYYY:HH:MM:SS, holding the UPS's own real-time clock; reading it returns the current UPS time and writing to it sets the clock, independent of sysUpTime. It lets an admin keep the UPS's internal clock synchronized so its logged alarm and event timestamps are accurate. For example, after replacing a UPS's battery (which can reset its clock), an admin would write the current date and time to upsConfigDateAndTime to correct it.