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Modifying the Default Time Zone for a Router or Switch Running Junos OS

The default local time zone on the router is UTC (Coordinated Universal Time, formerly known as Greenwich Mean Time, or GMT). To modify the local time zone, include the time-zone statement at the [edit system] hierarchy level:

[edit system]time-zone (GMThour-offset | time-zone);

You can use the GMT hour-offset option to set the time zone relative to UTC (GMT) time. By default, hour-offset is 0. You can configure this to be a value in the range from –14 to +12.

You can also specify time-zone as a string such as PDT (Pacific Daylight Time) or WET (Western European Time), or specify the continent and major city.

Note: Junos OS complies with the POSIX time-zone standard, which is counter-intuitive to the way time zones are generally indicated relative to UTC. A time zone ahead of UTC (east of the Greenwich meridian) is commonly indicated as GMT +n; for example, the Central European Time (CET) zone is indicated as GMT +1. However, this is not true for POSIX time zone designations. POSIX indicates CET as GMT-1. If you include the set system time-zone GMT+1 statement for a router in the CET zone, your router time will be set to one hour behind GMT, or two hours behind the actual CET time. For this reason, you might find it easier to use the POSIX time-zone strings, which you can list by entering set system time-zone ?.

For the time zone change to take effect for all processes running on the router or switch, you must reboot the router or switch.

The following example shows how to change the current time zone to America/New_York:

[edit]user@host# set system time-zone America/New_York[edit]user@host# show
system {time-zone America/New_York;}
 

Related Documentation

 

Published: 2013-02-22

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