D-Link DCS-4612EK User Manual page 31

Section 3: Configuration
Step 4: Set your Camera's Time Zone
Time Zone Select your time zone.
Daylight Toggle this to enable daylight saving time.
Savings Time
Start Time Select when daylight saving time should start.
End Time Select when daylight saving time should end.
D-Link Vigilance H.265 Outdoor Bullet Camera User Manual 31