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Convert Apache Airflow cron to AWS EventBridge
Apache Airflow expressions look similar to AWS EventBridge, but the differences matter. Paste yours below; the result is checked against the original run times.
What changes from Apache Airflow to AWS EventBridge
- Apache Airflow numbers Sunday as 0, but AWS EventBridge uses 1-7 starting on Sunday. Every weekday number is increased by one (Monday-Friday becomes 2-6).
- AWS EventBridge requires a
?in exactly one of the two day fields. The converter puts it in the day field you did not use. - AWS EventBridge has a year field. The converter appends
*so the schedule repeats every year. - Apache Airflow runs when day-of-month or day-of-week matches, but AWS EventBridge requires both. If you set both fields, the converter warns you.
Worked examples
| Schedule | Apache Airflow | AWS EventBridge |
|---|---|---|
| every minute | * * * * * | * * * * ? * |
| every 5 minutes | */5 * * * * | */5 * * * ? * |
| every 10 minutes | */10 * * * * | */10 * * * ? * |
| every 15 minutes | */15 * * * * | */15 * * * ? * |
| every 30 minutes | */30 * * * * | */30 * * * ? * |
| every hour | 0 * * * * | 0 * * * ? * |
| every 2 hours | 0 */2 * * * | 0 */2 * * ? * |
| every 3 hours | 0 */3 * * * | 0 */3 * * ? * |
Field layout and time zones
minute (0-59), hour (0-23), day-of-month (1-31), month (1-12), day-of-week (0-7, 0 and 7 = Sunday).
Airflow defaults to UTC. On a time-zone-aware DAG a cron schedule follows wall-clock time, so a daily 00:00 US/Eastern run moves between 04:00 and 05:00 UTC across daylight saving changes.
minute (0-59), hour (0-23), day-of-month (1-31), month (1-12), day-of-week (1-7, 1 = Sunday), year (1970-2199, required).
EventBridge rules always run in UTC. If you want a local time zone with DST support, use EventBridge Scheduler instead.
Go the other way
Convert AWS EventBridge to Apache Airflow, or open the Apache Airflow builder or the AWS EventBridge builder.
Frequently asked questions
How do I convert a Apache Airflow cron expression to AWS EventBridge?
Paste it into the converter above with Apache Airflow as the source and AWS EventBridge as the target. For example, * * * * * becomes * * * * ? *.
Is every Apache Airflow expression convertible to AWS EventBridge?
Yes for the common schedules we tested (30 of 30), though unusual expressions with special characters might need manual review.
Does AWS EventBridge run in the same time zone as Apache Airflow?
Not necessarily. Conversion changes the syntax, not the time zone. Check where each system evaluates the schedule before you rely on the same clock times.