To change the time and date on a Samsung iDCS100, OfficeServ 7100, OfficeServ 100, OfficeServ 7200, OfficeServ 7400, iDCS500, 50si, DS616 and iDCS16 you must first log into admin programming:

1. Leave the handset down and press Transfer 200
2. Enter the pass code (1 2 3 4 by default)
3. Press 1 and then Speaker

Once you are in programming mode follow these steps to change your time and date:

1. Dial 505
2. Enter the day of the week (Monday is 1, Tuesday is 2, Wednesday is 3, etc.)
3. Enter 2 digits for the Month
4. Enter 2 digits for the Day of the Month
5. Enter 2 digits for the Year
6. Enter the hour in 24-hour format
7. Enter the minutes
8. Press Transfer to exit

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