Panasonic KX-TD816 Programming Manual page 121

Conditions
• This programming can only be used if "Auto (automatic)" is selected in programme
[101] Day / Night Service Switching Mode.
• Lunch / Break service ends at the assigned time.
For example:
If Lunch is 3:00 – 4:00 PM, Day mode starts at 4:01 PM.
If Lunch is 3:00 – 3:59 PM, Day mode starts at 4:00 PM.
Features Guide References
Day / Night Service
General Programming
2.2 System Programming
121