scheduleExpression

The expression that defines when the schedule runs. The following formats are supported.

• at expression - at(yyyy-mm-ddThh:mm:ss)

• rate expression - rate(value unit)

• cron expression - cron(fields)

You can use at expressions to create one-time schedules that invoke a target once, at the time and in the time zone, that you specify. You can use rate and cron expressions to create recurring schedules. Rate-based schedules are useful when you want to invoke a target at regular intervals, such as every 15 minutes or every five days. Cron-based schedules are useful when you want to invoke a target periodically at a specific time, such as at 8:00 am (UTC+0) every 1st day of the month.

A cron expression consists of six fields separated by white spaces: (minutes hours day_of_month month day_of_week year).

A rate expression consists of a value as a positive integer, and a unit with the following options: minute | minutes | hour | hours | day | days

For more information and examples, see Schedule types on EventBridge Scheduler in the EventBridge Scheduler User Guide.