Setting up Time Zone

A system time zone must be specified, this can be done by either specifying the zone as Region/Location or as offset from UTC, the system's default zone is GMT. When the Region/Location format is being used, daylight savings time (DST) adjustments are done automatically. To set a zone, -completion can be used to display the various options, be aware that these are case sensitive:

vyos@vyos-rtr# set system time-zone 
Possible completions:
          Local time zone
   Africa       
   America      
   Antarctica   
   Arctic       
   Asia         
   Atlantic     
   Australia    
   Brazil       
   Canada       
   Chile        
   Etc          
   Europe       
   Indian       
   Mexico       
   Pacific      
   SystemV      
   US           
   UTC          

Detailed information:
  Enter the local timezone by specifying "Region/City"
    Use auto-completion to see available regions and cities.
    Start with one of these regions:
      Africa      America   Antarctica   Arctic   Asia     Atlantic
      Australia   Brazil    Canada       Chile    Europe   Indian
      Mexico      Mideast   Pacific      US

Show current time zone:

vyos@vyos-rtr# show system time-zone

To delete a time-zone:

vyos@vyos-rtr# delete system time-zone

Example 1: Set the system time zone to US/Pacific time:

vyos@vyos-rtr# set system time-zone US/Pacific
vyos@vyos-rtr# commit
vyos@vyos-rtr# show system time-zone
  time-zone US/Pacific

Example 2: To set a UTC offset use Etc/, use the positive sign (+) for west of Greenwich and the negative sign (-) for east of Greenwich (POSIX compliance); A timezone 8 hours west of Greenwich (behind UTC) would be 'Etc/GMT+8':

vyos@vyos-rtr# set system time-zone Etc/GMT+8
vyos@vyos-rtr# commit
vyos@vyos-rtr# show system time-zone
  time-zone Etc/GMT+8