Upgrade Window Recurrence Patterns

Examples of RFC 5545 recurrence pattern definitions. Use these when setting upgrade windows.

Important

Recurring upgrade windows are scheduled using the start date and time as a reference point. Upgrades don't occur on the specified start date and time. Rather, an upgrade window opens on a day or date calculated from the start date, based on the recurrence settings. That means a recurring upgrade window is scheduled on the selected days of the week or month after the start date, at the specified start time.

For example, if a recurring window is configured to start on a Monday at 22:00 UTC with recurrence set to every other Friday, the next upgrade window doesn't open on Monday but on Friday at 22:00 UTC.

For more information on the format required, see RFC 5545.

Any time

The upgrade can occur anytime. This is the same functionality as not having an upgrade schedule.

FREQ=WEEKLY;BYDAY=SU,MO,TU,WE,TH,FRI,SA

Weekly, on Tuesdays and Fridays

FREQ=WEEKLY;BYDAY=TU,FR

Monthly, on the first Sunday of the month

FREQ=MONTHLY;BYDAY=1SU

Every third month on the last Wednesday of the month

FREQ=MONTHLY;INTERVAL=3;BYDAY=-1WE

Every 10 days

FREQ=DAILY;INTERVAL=10

Yearly, in April

The day is obtained from the first start date/time.

FREQ=YEARLY;BYMONTH=4