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Cron expressions in Serverless Integrations

Written by
Updated at October 14, 2025

You can set schedules in Serverless Integrations using cron expressions. By default, cron expression uses UTC+0.

Cron expression format

Cron expression field order: Seconds Minutes Hours Day-of-month Month Day-of-week.

Possible field values

Note

Special characters, as well as months and days of the week, are case-insensitive: MON is the same as mon.

Field
name		 Required
field		 Acceptable
values		 Supported
special
characters
Seconds, seconds Yes 0-59 ,, -, *, /
Minutes, minutes Yes 0-59 ,, -, *, /
Hours, hours Yes 0-23 ,, -, *, /
Day of month, day of the month Yes 1-31 EventRouter: ,, -, *, ?, /, L, W; Workflows: all of the above except ?, L, and W.
Month, month Yes 1-12,
JAN-DEC		 ,, -, *, /
Day of week, day of the week Yes 1-7,
MON-SUN		 EventRouter: ,, -, *, ?, /, L, #; Workflows: all of the above except ?, L, and #.

Special characters

You can use the following special characters in cron expressions:

  • *: Selects all values in the field.

    * in Minutes: The timer starts every minute.

  • ?: Selects any field value. You cannot specify Day of month and Day of week at the same time. If you have entered a value in one of these fields, put ? in the other one. Workflows does not support ? in the Day of week field.

    10 in Day of month and ? in Day of week: The timer starts every tenth day of the month.

  • - : Selects a range of values.

    10-12 in Hours: The timer starts at 10 a.m., 11 a.m., and 12 p.m.

  • ,: Selects multiple values.

    MON,WED,FRI in Day of week: The timer starts on Monday, Wednesday, and Friday.

  • /: Increment the value.

    0/15 in Minutes: The timer starts at 0, 15, 30, and 45 minutes past each hour.

  • L: This character functions differently in the two fields it is valid for:

    • In the Day of month field, it stands for the last day of the month.
    • In the Day of week field, it stands for the last day of the week, 7 (Sunday, SUN).

    It is only supported for EventRouter.

    L in Day of month: The timer starts on January 31, February 28, and so on.

  • W: Selects the weekday nearest to the specified date. It is only supported for EventRouter.

    15W in Day of month: The timer starts on the weekday nearest to the 15th day of the month. If the 15th day is a Saturday, the timer starts on Friday the 14th.

    Note

    L and W in the Day of month field can also merge into the LW combination, starting the timer on the last weekday of the month.

  • #: Selects the Nth day of the month. It is only supported for EventRouter.

    6#3 in Day of week: The timer starts on the third Friday of the month (6 for Friday; 3 for the third Friday of the month).

Examples of cron expressions

Cron expression Description
0 * * * * ? The timer starts every minute.
0 0 * ? * * The timer starts every hour.
0 15 10 ? * * The timer starts every day at 10:15.
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