While your handset is on hook, press the TRFR key.
Dial 200
Dial the 4 digit password 1234
The display shows (Enable Cust.- Prog.- Disable)
Dial 1 to enable
Press the TRFR key twice.
Dial 505
Enter the new time and date using the format below:
NEW:WMMDDYY:HHMM
W- Day of the week (0 for Sunday and 6 for Saturday)
MM- Month (Enter 01 for January and 12 for December)
DD- Day of the month (Enter number in range of 01-31)
YY- Year (Enter the last two digits of the year.)
HH- Hour (Enter the number in a range from 00-24
MM- Minutes (Enter a number in the range of 00-59)
Press TRFR to store and exit.