Cisco Systems 3750E manual Configuring Summer Time Daylight Saving Time, Hh mm offset

Chapter 7 Administering the Switch

Managing the System Time and Date

Configuring Summer Time (Daylight Saving Time)

Beginning in privileged EXEC mode, follow these steps to configure summer time (daylight saving time) in areas where it starts and ends on a particular day of the week each year:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	clock summer-time zone recurring	Configure summer time to start and end on the specified days every year.
	[week day month hh:mm week day month	Summer time is disabled by default. If you specify clock summer-time
	hh:mm [offset]]	zone recurring without parameters, the summer time rules default to the
		United States rules.
		• For zone, specify the name of the time zone (for example, PDT) to be
		displayed when summer time is in effect.
		• (Optional) For week, specify the week of the month (1 to 5 or last).
		• (Optional) For day, specify the day of the week (Sunday, Monday...).
		• (Optional) For month, specify the month (January, February...).
		• (Optional) For hh:mm, specify the time (24-hour format) in hours and
		minutes.
		• (Optional) For offset, specify the number of minutes to add during
		summer time. The default is 60.
Step 3
	end	Return to privileged EXEC mode.
Step 4
	show running-config	Verify your entries.
Step 5
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

The first part of the clock summer-timeglobal configuration command specifies when summer time begins, and the second part specifies when it ends. All times are relative to the local time zone. The start time is relative to standard time. The end time is relative to summer time. If the starting month is after the ending month, the system assumes that you are in the southern hemisphere.

This example shows how to specify that summer time starts on the first Sunday in April at 02:00 and ends on the last Sunday in October at 02:00:

Switch(config)# clock summer-time PDT recurring 1 Sunday April 2:00 last Sunday October

2:00

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-02 7-13