Dialects · 7

Every cron dialect

Field counts, day-of-week numbering, special characters, minimum intervals. Pick the dialect that matches your target platform — each page has a 600–900 word reference plus an interactive builder pre-set to that dialect's defaults.

Unix cron

5 fields

0 9 * * 1-5

Quartz

6 fields

0 0 9 ? * MON-FRI

Six fields with seconds and an optional year. Supports `?`, `L`, `W`, `#` for end-of-month and nth-weekday patterns.

AWS EventBridge

6 fields

0 9 ? * MON-FRI *

Six fields including a mandatory year. Requires `?` in either day-of-month or day-of-week — never both.

Kubernetes

5 fields

0 9 * * 1-5

Standard 5-field syntax with `.spec.timeZone` (stable since v1.27) and concurrency policy on top.

GitHub Actions

5 fields

0 9 * * 1-5

Five fields, UTC only, 5-minute minimum interval. Subject to peak-load delays.

Vercel

5 fields

0 9 * * 1

Five fields, numeric only — no alphabetic aliases. Hobby plan limited to one run per day.

Spring @Scheduled

6 fields

0 0 9 ? * MON-FRI

Six fields, no year. Use the `zone` attribute on `@Scheduled` to avoid JVM-default-timezone surprises.