Cron in AWS EventBridge: Schedule Rules With Cron and Rate Expressions
Schedule AWS resources using EventBridge cron and rate expressions. Trigger Lambda, Step Functions, and ECS tasks on a precise schedule.
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Tags: developer-tools, cron, aws
Cron in AWS EventBridge: Schedule Rules With Cron and Rate Expressions AWS EventBridge Scheduler (and the older EventBridge Rules) lets you trigger AWS services on a schedule using either cron expressions or rate expressions. The cron format has critical differences from standard Linux cron — using the wrong format silently produces unexpected schedules or fails validation entirely. This guide covers both expression types, the AWS-specific differences, targeting Lambda and Step Functions, and the IAM requirements that trip people up. Rate Expressions Rate expressions are the simpler option. They run a job at a fixed interval starting from when the rule is created. Syntax: Rules: must be a positive integer must be , , , , , or Use singular (, , ) when value is 1 Minimum interval is 1…
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