Reference Guide
978 | System Time and Date
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Set Recurring Daylight Saving Time
Set a date (and time zone) on which to convert the switch to daylight saving time on a specific day every 
year.
If you have already set daylight saving for a one-time setting, you can set that date and time as the 
recurring setting with the 
clock summer-time time-zone recurring command.
Command Syntax Command Mode Purpose
clock summer-time 
time-zone recurring 
start-week start-day 
start-month start-time 
end-week end-day 
end-month end-time 
[offset]
CONFIGURATION Set the clock to the appropriate timezone and adjust to 
daylight saving time every year.
time-zone: Enter the three-letter name for the time 
zone. This name is displayed in the show clock output.
start-week: (OPTIONAL) Enter one of the following as the 
week that daylight saving begins and then enter values for 
start-day through end-time:
•
week-number: Enter a number from 1-4 as the number 
of the week in the month to start daylight saving time.
•
first: Enter this keyword to start daylight saving time in the 
first week of the month.
•
last: Enter this keyword to start daylight saving time in the 
last week of the month.
start-month: Enter the name of one of the 12 months in 
English.
You can enter the name of a day to change the order of the 
display to time day month year
start-day: Enter the number of the day.
Range: 1 to 31.
You can enter the name of a month to change the order of the 
display to 
time day month year.










