Specifications

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Cisco SCE 2000 and SCE 1000 CLI Command Reference
OL-26797-03
Chapter 2 CLI Command Reference
clock summertime
Command History This table includes the following release-specific history entries:
Usage Guidelines The format of the command varies somewhat, depending on how the dates for the beginning and end of
daylight savings time are determined for the particular location:
• recurring: If daylight savings time always begins and ends on the same day every year, (as in the
United States):
– Use the clock summer-time recurring command.
– The year parameter is not used.
• not recurring: If the start and end of daylight savings time is different every year, (as in Israel):
– Use the clock summer-time command.
– The year parameter must be specified.
General guidelines for configuring daylight savings time transitions:
• Specify the time zone code for daylight savings time.
• recurring: specify a day of the month (week#|first|last/day of the week/month).
• not recurring: specify a date (month/day of the month/year).
• Define two days:
– Day1 = beginning of daylight savings time.
– Day2 = end of daylight savings time.
In the Southern hemisphere, month2 must be before month1, as daylight savings time begins in the
fall and ends in the spring.
• Specify the exact time that the transition should occur (24 hour clock).
– Time of transition into daylight savings time: according to local standard time.
– Time of transition out of daylight savings time: according to local daylight savings time.
For the clock summer-time recurring command, the default values are the United States transition rules:
• Daylight savings time begins: 2:00 (AM) on the second Sunday of March.
• Daylight savings time ends: 2:00 (AM) on the first Sunday of November.
Use the recurring keyword if daylight savings time always begins and ends on the same day every year.
Use the first/last keywords to specify the occurrence of a day of the week in a specified month: For
example: last Sunday March.
Use a specific date including the year for a not recurring configuration. For example: March 29, 2004.
Use week/day of the week/month (no year) for a recurring configuration:
• Use first/last occurrence of a day of the week in a specified month. For example: last, Sunday, March
(the last Sunday in March).
• Use the day of the week in a specific week in a specified month. For example: 4,Sunday, March (the
fourth Sunday in March). This would be different from the last Sunday of the month whenever there
were five Sundays in the month.
Release Modification
2.5.7 This command was introduced.