The complete user's manual for your phone is available at the following link:
http://www.retrevo.com/d/df/MANUAL000032975.pdf?doc=532906c5a747ab87134404141e9c11c8&ts=1313184836863&rk=0.17208479428095913
Just use your mouse to click on the link which is the highlighted and underlined text above. This will open a new browser page for you automatically and allow you to download the manual.
Here is an excerp from that manual which describes how to set the time and date:
GETTING STARTED
Caller ID Initial Setup:
After the battery installation and telephone line connection the display will show the Set Language screen:
Set Language
1. Press the Review UP or DOWN button to select the desired language.
E=ENGLISH
F=FRENCH
S=SPANISH
2. Once the desired language is selected , press the ERASE button to
confirm selection.
3. Then the display will change to the Set Time / Date screen and the hour icon will be blinking.
Set Time/Date
1. Press the UP or DOWN button to set the current hour.
2. Press the ERASE button to shift to the minute setting.
3. Repeat steps 1 and 2 above to set MINUTE, MONTH and DATE.
4. Once the correct TIME/DATE is shown on the display, press the
ERASE button to end the setting. Then the display will change to
show the normal status.
Changing The Language Mode and TIME/DATE
1. Press and hold the ERASE button then press UP button.
2. Then follow the steps described above.
Good luck, I hope this was helpful.
Joe.