I had a need to check and possibly change the date and time on a Honeywell Security System via the Security Pad. Here are some generic instruction steps to check or change the settings:

Enter your four-digit security code and press “#” and “63.”
Press “*” when the date/time displays on the screen.
Enter two digits for the hour, two digits for the minute, and press “1” for PM or “0” for AM. Enter the last two digits of the current year. Use the “*” button to enter a space between each setting.
Enter two digits for the month and two digits for the day. Press “*” to confirm the settings.

source: http://www.ehow.com/how_7557344_program-honeywell-alarm.html