AWS Cron Daily at Midnight

In AWS EventBridge, the cron expression for daily at midnight UTC is cron(0 0 * * ? *). This triggers once per day at 00:00 UTC. Remember, AWS cron always runs in UTC — midnight UTC is 7 PM Eastern (EST) or 5 PM Pacific (PST).

For a daily schedule at a different time, change the hour: cron(0 14 * * ? *) runs at 2 PM UTC (9 AM Eastern). You can also use the rate expression rate(1 day), though rate expressions run relative to when the rule was created rather than at a fixed time.

A common pattern is to trigger a Lambda function daily for ETL, report generation, or cleanup. Pair with SNS notifications to alert on failures: configure a CloudWatch alarm on the Lambda's error metric or use EventBridge's dead-letter queue.