Cron Expression Reference
Syntax guides, field references, and a library of common cron expressions for every major platform.
Platform Guides
Linux / Unix Crontab
Standard 5-field cron — the universal baseline
AWS EventBridge
6-field with year; uses ? for dom/dow
Kubernetes CronJob
Standard 5-field + @every extensions + full YAML manifest
GitHub Actions
Standard 5-field in UTC only; @alias support
Quartz Scheduler
6-7 field with seconds; L, W, # special chars
Spring @Scheduled
Quartz-format 6-field; @Scheduled annotation output
Azure Functions
6-field NCRONTAB with seconds prepended
Google Cloud Scheduler
Standard 5-field with timezone support
Jenkins
Standard 5-field + H hash token for load distribution
Apache Airflow
Standard 5-field + @daily, @once, and preset aliases
Field Reference
Expression Library
Frequency
Every Minute
* * * * *Every 2 Minutes*/2 * * * *Every 5 Minutes*/5 * * * *Every 10 Minutes*/10 * * * *Every 15 Minutes*/15 * * * *Every 30 Minutes*/30 * * * *Every Hour0 * * * *Every 2 Hours0 */2 * * *Every 3 Hours0 */3 * * *Every 6 Hours0 */6 * * *Every 12 Hours0 */12 * * *Every Day at Midnight0 0 * * *Twice Daily (Midnight & Noon)0 0,12 * * *Every Weekday at Midnight0 0 * * 1-5Every Weekend at Midnight0 0 * * 6,0Once a Week (Monday at Midnight)0 0 * * 1Twice Weekly (Monday & Thursday)0 0 * * 1,4Once a Month (1st at Midnight)0 0 1 * *Every Quarter (1st of Jan, Apr, Jul, Oct)0 0 1 1,4,7,10 *Once a Year (Jan 1st at Midnight)0 0 1 1 *