0 0 */2 * *. The day-of-month step fires on every odd day (1, 3, 5, …) at midnight. The cadence resets at month boundaries — see the pitfalls section on the pillar guide for the workaround.View future cron matches in a calendar
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0 0 */2 * *
The day-of-month step */2 selects odd or even days — 1, 3, 5, 7, …, 29 (or 31). The cadence resets at the month boundary, so February going into March may produce two runs only one day apart. For strict 48-hour intervals, use a runtime check.
See the dedicated guide for the full breakdown: Cron every day.
Paste it into the editor above to see the next runs on a calendar.
0 9 */2 * * — every other day at 09:000 0 2-30/2 * * — every other day starting from the 2nd (even days)0 0 */2 * * uses standard 5-field cron syntax, so it works in:
crontab — 0 0 */2 * * /path/to/script.shvercel.json.cron(...) with day-of-week as ? and a year field.0) and append day-of-week ?.`0 0 */2 * *`. Paste this into any cron-compatible scheduler (Linux crontab, AWS EventBridge, Vercel cron, Quartz, node-cron, robfig/cron) to run a job every other day.
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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