EverFocus EDR810H Insruction Manual page 26

TIME ZONE: You can set the time zone where you locate if you
connect to network and enable time synchronize.
Atlantic Daylight Time subtract 3 hours from GMT
Atlantic Standard Time subtract 4 hours from GMT
Eastern Daylight Time subtract 4 hours from GMT
Eastern Standard Time subtract 5 hours from GMT
Central Daylight Time subtract 5 hours from GMT
Central Standard Time subtract 6 hours from GMT
Mountain Daylight Time subtract 6 hours from GMT
Mountain Standard Time subtract 7 hours from GMT
Pacific Daylight Time subtract 7 hours from GMT
Pacific Standard Time subtract 8 hours from GMT
Alaska Daylight Time subtract 8 hours from GMT
Alaska Standard Time subtract 9 hours from GMT
Hawaii-Aleutian Daylight Time subtract 9 hours from GMT
Hawaii-Aleutian Standard Time subtract 10 hours from GMT
TIME UPDATE
SYNCHRONIZE, you can select the synchronization frequency by:
DAY
Diagram 3.3
BY: Once you
WEEK MONTH
18
enable the TIME