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Cron expressions

Cron expressions encode a repeating interval of time. The format supported by the pump machinery of the Sesam node is explained in more detail below. It mostly follows the explanation here: https://en.wikipedia.org/wiki/Cron but note that the special characters W and # are not supported by our implementation.

Note

Cron expressions are evaluated in the UTC timezone.

Syntax

A cron expression is a string of 5 or 6 fields separated by space character. The string is parsed from left to right and denotes in sequence:

Field name

Mandatory?

Allowed values

Allowed special characters

Minutes

Yes

0-59

* , - /

Hours

Yes

0-23

* , - /

Day of month

Yes

1-31

* , - ? L

Month

Yes

1-12 or JAN-DEC

* , - /

Day of week

Yes

0-6 or SUN-SAT

* , - ? L /

Year

No

1970–2099

* , -

Examples

Expression

Meaning

0 12 * * ?

Start at noon every day

15 10 ? * *

Start at 10:15 every day

15 10 * * ? *

Start at 10:15 every day

15 10 * * ? 2016

Start at 10:15 every day during the year 2016

* 14 * * ?

Start every minute starting at 14:00 and ending at 14:59, every day

0/5 14 * * ?

Start every 5 minutes starting at 14:00 and ending at 14::55, every day

0/5 14,18 * * ?

Start every 5 minutes starting at 14:00 and ending at 14:55, and also fire every 5 minutes starting at 18:00 and ending at 18:55, every day

0-5 14 * * ?

Start every minute starting at 14:00 and ending at 14:05, every day

10,44 14 ? 3 WED

Start at 14:10 and at 14:44 every wednesday in March

15 10 ? * MON-FRI

Start at 10:15 every monday to friday

15 10 15 * ?

Start at 10:15 on the 15th day of every month

15 10 L * ?

Start at 10:15 on the last day of every month

15 10 ? * 6L

Start at 10:15 on the last friday of every month

15 10 ? * 6L 2002-2005

Start at 10:15 on every last friday of every month for the years 2002 to 2005

15 10 ? * 6#3

Start at 10:15 on the third friday of every month

0 12 1/5 * ?

Start at noon every 5 days every month, starting with the first day of the month

11 11 11 11 ?

Start every 11th of november at 11:11

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