Cron symbol: W

The W (nearest weekday) character in Quartz cron

A number followed by W means "the weekday nearest to that day of the month". It is how Quartz handles paydays and due dates that fall on weekends.

The rules

15W: the weekday closest to the 15th, never leaving the month.
If the 15th is a Saturday it runs on Friday the 14th; if Sunday, on Monday the 16th.
1W on a Saturday runs on Monday the 3rd, because it will not move back into the previous month.
Only valid in the day-of-month field.

0 0 9 15W * ?

At 09:00 UTC, on the weekday nearest the 15th of the month. Mid-month payroll on the nearest weekday.

First runs after 1 Jan 2027 (UTC): Fri, 15 Jan 2027, 09:00 · Mon, 15 Feb 2027, 09:00 · Mon, 15 Mar 2027, 09:00

0 0 9 1W * ?

At 09:00 UTC, on the weekday nearest the 1st of the month. First working day of the month, roughly.

First runs after 1 Jan 2027 (UTC): Fri, 01 Jan 2027, 09:00 · Mon, 01 Feb 2027, 09:00 · Mon, 01 Mar 2027, 09:00

0 0 9 LW * ?

At 09:00 UTC, on the last weekday of the month. Last working day of the month.

First runs after 1 Jan 2027 (UTC): Fri, 29 Jan 2027, 09:00 · Fri, 26 Feb 2027, 09:00 · Wed, 31 Mar 2027, 09:00

AWS EventBridgeOpen in tester

0 9 15W * ? *

At 09:00 UTC, on the weekday nearest the 15th of the month. EventBridge supports W as well.

First runs after 1 Jan 2027 (UTC): Fri, 15 Jan 2027, 09:00 · Mon, 15 Feb 2027, 09:00 · Mon, 15 Mar 2027, 09:00

Is 1W the same as the first business day?

Mostly. It lands on the first weekday of the month, but ignores holidays.