cron
0 3 * * 0Docker Image Cleanup — Weekly Sunday 3 AM
“At 03:00, on Sunday”
Docker image and container cleanup job every Sunday at 3:00 AM. Runs 'docker image prune', 'docker container prune', and 'docker volume prune' to reclaim disk space on build servers and registries.
Weekly1 per week runs/day
Want to customize this schedule or validate your own cron expression?
Try it live →Field Breakdown
| Field | Value | Meaning |
|---|---|---|
| minute | 0 | 0 |
| hour | 3 | 3 |
| day | * | every day of month |
| month | * | every month |
| weekday | 0 | Sunday |
0
minute
3
hour
*
day
*
month
0
weekday
Lint Analysis
Info
This time may fall within a DST transition gap for some timezones. Jobs could be skipped or run twice.
Common Use Cases
- ✓docker image prune weekly
- ✓Container registry cleanup
- ✓Build server disk reclaim
- ✓Docker volume orphan removal
Code Examples
Bash / crontab
# Run your script on schedule: 0 3 * * 0 0 3 * * 0 /path/to/your/script.sh
Node.js (node-cron)
import cron from 'node-cron';
cron.schedule('0 3 * * 0', () => {
console.log('Running scheduled task');
});Python (APScheduler)
from apscheduler.schedulers.blocking import BlockingScheduler
scheduler = BlockingScheduler()
@scheduler.scheduled_job('cron', minute='0', hour='3', day_of_week='0')
def my_job():
print('Running scheduled task')
scheduler.start()GitHub Actions Workflow
Generate a ready-to-use .github/workflows/schedule.yml file. Customize the name and download directly.
GitHub Actions
# .github/workflows/schedule.yml
name: Docker Image Cleanup — Weekly Sunday 3 AM
on:
schedule:
- cron: '0 3 * * 0'
workflow_dispatch: # allow manual trigger
jobs:
run:
runs-on: ubuntu-latest
steps:
- name: Checkout code
uses: actions/checkout@v4
- name: Run scheduled task
run: |
echo "Running on schedule: 0 3 * * 0"
# Add your commands here
Save as .github/workflows/schedule.yml in your repository root
Cron Syntax Quick Reference
| Field | Allowed Values | Special Chars |
|---|---|---|
| minute | 0–59 | * , - / |
| hour | 0–23 | * , - / |
| day of month | 1–31 | * , - / |
| month | 1–12 or JAN–DEC | * , - / |
| day of week | 0–7 or SUN–SAT | * , - / |
Special characters: *= any value ,= list -= range / = step
Related Patterns — Weekly
Need to build your own cron expression from scratch?
Open the Cron Expression Builder →