What 0 */12 * * * means
Twice daily at midnight and noon; suits jobs that want a morning and an evening pass.
In plain English, cron reads this as: on the hour, every 12 hours, every day.
Field-by-field breakdown
| Field | Value | Meaning |
|---|---|---|
| Minute | 0 | at 0 |
| Hour | */12 | every 12 |
| Day of month | * | every value |
| Month | * | every value |
| Day of week | * | every value |
Editing this schedule
To adjust this expression or explain a different one, open the full cron expression parser — it explains any crontab line, lists upcoming runs and breaks down each field as you type. New to the syntax? The practical guide to cron expressions walks through every field with worked examples.