Simon XT - Set System Date
1. Press or until Set Date then press
2. Enter Master Code then press OK to display date then press
3. Year flashes, enter 4-digit year 0000 to 9999 then press
4. Month flashes, enter 2-digit Month 01 to 12 then press
5. Day flashes, enter 2-digit Day 01 to 31 then press
6. Press STATUS to exit