D-Link DIR-816L User Manual page 227

DIR-816L Wireless AC750 Dual Band Router & Access Point
with 3G/CDMA/LTE Support and USB Port
User Manual
When the router is powered off or rebooted, the system time is reset to the default value.
!
If you have set automatic synchronization for the system time, the internal clock of the
device will be configured after connecting to the Inter net. If you have set the system time
manually, you need to set the time and date again (see above).
Page 227 of 304
Configuring Device (Router Mode)