Cron expression details-Identity as a Service(IDaaS)-阿里云帮助中心

Cron expressions control when scheduled tasks run in IDaaS EIAM. Each expression contains 6 or 7 space-separated fields, each representing a time unit.

Warning

Cron expressions in the IDaaS identity provider require intervals of at least 1 hour. Set intervals appropriately to match your data synchronization frequency.

Syntax

┌─────────────── Seconds   (0–59)
│ ┌───────────── Minutes   (0–59)
│ │ ┌─────────── Hours     (0–23)
│ │ │ ┌───────── Day of month  (1–31)
│ │ │ │ ┌─────── Month    (1–12 or JAN–DEC)
│ │ │ │ │ ┌───── Day of week   (0–7 or SUN–SAT)
│ │ │ │ │ │ ┌─── Year     (1970–2199, optional)
│ │ │ │ │ │ │
* * * * * * *

Both 0 and 7 represent Sunday in the Day of week field. The Year field can be left blank.

Allowed values and special characters

Field	Time unit	Value range	Allowed special characters
1	Seconds	0–59	`- * /`
2	Minutes	0–59	`- * /`
3	Hours	0–23	`- * /`
4	Day of month	1–31	`- * ? / L W C`
5	Month	1–12 or JAN–DEC	`JAN-DEC - * /`
6	Day of week	0–7 or SUN–SAT	`SUN-SAT - * ? / L C #`
7 (optional)	Year	Empty or 1970–2199	`, - * /`

Special characters

Character	Meaning	Example
`*`	All values in the field	Minutes = `*` triggers every minute
`?`	Any value; use in Day of month or Day of week to avoid conflict between the two fields	`13 13 15 20 * ?` triggers on the 20th of each month regardless of the day of week. Because Day of month is already set to `20`, Day of week must use `?`, not `*`.
`-`	A range of values	Minutes = `5-20` triggers every minute from :05 to :20
`/`	Start value and step interval	Minutes = `5/20` triggers at :05, :25, and :45
`,`	A list of values	Minutes = `5,20` triggers at :05 and :20
`L`	Last day or weekday of the month; use in Day of month or Day of week	Day of week = `5L` triggers on the last Thursday of each month
`W`	Nearest business day (Monday–Friday) to the specified date; use in Day of month only. Limited to the current month.	Day of month = `5W`: if the 5th is Saturday, triggers on the 4th (Friday); if the 5th is Sunday, triggers on the 6th (Monday); if the 5th is a business day, triggers on that day.
`LW`	Last business day of the month, which is the last Friday	—
`#`	Nth occurrence of a weekday in the month; use in Day of week only.	Day of week = `4#2` triggers on the second Wednesday of each month (4 = Wednesday, 2 = second occurrence)

Examples

Note

Adjust the time parameters, including the year, to match your requirements.

Schedule	Expression
Every 2 hours	`0 0 /2 * ?`
At 1 AM every day	`0 0 1 * * ?`
At 11 PM every day	`0 0 23 * * ?`
At 12 PM every day	`0 0 12 * * ?`
At 10:15 AM every day	`0 15 10 ? * *`
At 10:15 AM every day	`0 15 10 * * ?`
At 10:15 AM every day	`0 15 10 * * ? *`
At 12 AM, 1 PM, 6 PM, and 9 PM every day	`0 0 0,13,18,21 * * ?`
At 10 AM, 2 PM, and 4 PM every day	`0 0 10,14,16 * * ?`
At 10:15 AM, Monday through Friday	`0 15 10 ? * MON-FRI`
At 12 PM every Wednesday	`0 0 12 ? * WED`
At 1 AM every Sunday	`0 0 1 ? * L`
At 2 AM on the 1st of each month	`0 0 2 1 * ?`
At 1 AM on the 1st of each month	`0 0 1 1 * ?`
At 10:15 AM on the 15th of each month	`0 15 10 15 * ?`
At 10:15 AM on the last day of each month	`0 15 10 L * ?`
At 11 PM on the last day of each month	`0 0 23 L * ?`
At 10:15 AM on the last Friday of each month	`0 15 10 ? * 6L`
At 10:15 AM on the last Friday of each month, 2025–2026	`0 15 10 ? * 6L 2025-2026`
At 10:15 AM on the third Friday of each month	`0 15 10 ? * 6#3`
At 10:15 AM every day in 2025	`0 15 10 * * ? 2025`