Cron Expression: 0 3 * * *
Every day at 03:00 (3 AM).
Field Breakdown
| Field | Value |
|---|---|
| Minute | 0 |
| Hour | 3 |
| Day of Month | * |
| Month | * |
| Day of Week | * |
Common Use Case
Database VACUUM, log rotation, certificate renewals.
Sample Fire Times (UTC)
| When | Unix Timestamp |
|---|---|
| 2026-04-28 03:00 | 1777345200 |
| 2026-04-29 03:00 | 1777431600 |
| 2026-04-30 03:00 | 1777518000 |
| 2026-05-01 03:00 | 1777604400 |
| 2026-05-02 03:00 | 1777690800 |
Sample times computed at build; your scheduler will fire on its own clock.
Equivalents in Popular Schedulers
crontab (Linux/macOS)
0 3 * * * /path/to/your/script.sh
GitHub Actions (.github/workflows/*.yml)
on:
schedule:
- cron: '0 3 * * *'
AWS EventBridge (cron format)
cron(0 3 * * *) # Note: AWS uses 6 fields with year
Kubernetes CronJob
spec: schedule: "0 3 * * *"