Cisco: how to set clock time, date, timezone, daylight savings change, and NTP for MDS switches

Set time zone:

config
clock timezone zone-name offset-hours offset-minutes

 example to set eastern time zone: ( eastern time zone is UTC -5, no minutes of offset)

config
clock timezone EST -5 0

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Set daylight savings time: ( Set the dates when the clock will change ahead and behind an hour, need to change this manually every year as the dates change)


Example for eastern daylight savings time:( setting the time zone, start week, day, month, time/ end week, day, month time/ offset in minutes)

This command sets daylight savings time to start the first week of march, Sunday, at 2 am and ends the first week of November on Sunday at 2 am, and sets the time forward 60 minutes on the start date, and back 60 minutes on the end date.

config                  
clock summer-time  EDT 1 Sunday March 02:00 1 Sunday November 02:00 60


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Set clock time: ( set time, day, month, year)

config
clock set 12:00:00 3 December 2017

If ntp feature is enabled, you cannot set the clock. Disable ntp (no ntp enable or no feature ntp), Then set clock, Then you can enable ntp again.
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Configure ntp: make sure clock time is set within 10 minutes of actual time or ntp may not sync properly.

config
ntp enable

ntp server 192.168.1.1<--- -sets the ntp server ( required, can set multiple peers as well)
ntp peer 10.1.1.1  <-----sets a peer switch that is using ntp or another ntp server ( not required)


to manually attempt ntp sync to clock, run the command:

 ntp sync-retry

Refer to this video: