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Command Mode
Privileged EXEC mode
User Guidelines
There are no user guidelines for this command.
Examples
The following example configures an external time source for the system clock.
console# clock source sntp
3.5.3 clock timezone
The clock timezone global configuration command sets the time zone for display purposes. To set the time to
Coordinated Universal Time (UTC), use the no form of this command.
Syntax
clock timezone hours-offset [minutes minutes-offset] [zone acronym ]
no clock timezone
§
hours-offse t— Hours difference from UTC. (Range: -12
§
minutes minutes-offse t— Minutes difference from UTC. (Range: 0
§
zone acronym —The acronym of the time zone. (Range: Up to 4 characters)
Default Configuration
UTC
Command Mode
Global Configuration mode
User Guidelines
The system internally keeps time in UTC, so this command is used only for display purposes and when the time is manually
set.
Examples
The following example sets the timezone to 6 hours difference from UTC.
console# (config)# clock timezone -6 zone CST
3.5.4 clock summer-time
The clock summer-time global configuration command configures the system to automatically switch to summer time
(daylight saving time),. To configure the software to not automatically switch to summer time, use the no form of this
command.
Syntax
clock summer-time recurring {usa | eu | {week day month hh:mm week day month hh:mm}} [offset offset] [zone
acronym ]
clock summer-time date date month year hh:mm date month year hh:mm [offset offset] [zone acronym ]
clock summer-time date month date year hh:mm month date year hh:mm [offset offset] [zone acronym ]
no clock summer-time
§
recurring — Indicates that summer time should start and end on the corresponding specified days every year.
§
date — Indicates that summer time should start on the first specific date listed in the command and end on the
second specific date in the command.
§
usa — The summer time rules are the United States rules.
§
eu — The summer time rules are the European Union rules.
§
week — Week of the month. (Range: 1 - 4, first, last)
day — Day of the week (Range: first three letters by name, like sun)
§
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