0 9 * * 0. The standard weekly cron — Sunday at midnight (0 0 * * 0) is the default @weekly alias on Linux crontab.View future cron matches in a calendar
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0 9 * * 0
The day-of-week value 0 (or 7) is Sunday in standard cron. Quartz uses 1=Sunday — verify the dialect when copying expressions across schedulers.
See the dedicated guide for the full breakdown: Cron every week.
Paste it into the editor above to see the next runs on a calendar.
0 0 * * 0 — every Sunday at midnight (equivalent to @weekly)0 9 * * SUN — name-alias form (equivalent)0 9 * * 7 — alternative numeric form (7 = Sunday)0 9 * * 0 uses standard 5-field cron syntax, so it works in:
crontab — 0 9 * * 0 /path/to/script.shvercel.json.cron(...) with day-of-week as ? and a year field.0) and append day-of-week ?.`0 9 * * 0`. Paste this into any cron-compatible scheduler (Linux crontab, AWS EventBridge, Vercel cron, Quartz, node-cron, robfig/cron) to run a job every Sunday at 09:00.
The editor above shows the next 30+ runs on a calendar in your local timezone, plus a plain-English description. If the calendar matches your intent, the cron is correct.
It uses standard 5-field cron syntax, so yes — Linux crontab, AWS EventBridge (with the additional `?` and year fields), Vercel cron jobs, Quartz Scheduler, node-cron, robfig/cron, and Kubernetes CronJob all accept it. Vercel's free Hobby plan caps the minimum frequency at once-per-day; the Pro plan removes that cap.
Most schedulers will start the new run anyway, leading to overlap. To prevent this, wrap the command with `flock -n /tmp/myjob.lock /path/to/script.sh` on Linux, or set `concurrencyPolicy: Forbid` on Kubernetes CronJob. Vercel cron and AWS EventBridge let you configure concurrency at the platform level.
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