Hi Sharp Digital video recorder User Manual page 22

TIME SYN
Synchronize time with internet time server.
Default time zone is GMT
Set the GMT on the DATE/TIME list and
Adjust TIME SYNC.
NTP server function is only for DVR client
HOLIDAY
In the schedule record setup , it automatically
converts normal date to holiday schedule.
It works when record is setup as schedule mode.
It takes 30 seconds to validate holiday list
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