Understanding 0 12 * * ? *
The cron expression 0 12 * * ? * breaks down as follows:
| Field | Value | Meaning |
|---|---|---|
| Special expression | ||
When Does 0 12 * * ? * Run?
This cron expression will execute:
- Variable schedule
- In the server's configured timezone (usually UTC)
Example Next Run Times
Starting from January 1, 2025 00:00:
- Jan 1, 2025 at the scheduled time
- Jan 2, 2025 at the scheduled time
- Jan 3, 2025 at the scheduled time
- (Use our Cron Tester for exact times)
How to Use This Cron Expression
Linux/Unix Crontab
0 12 * * ? * /path/to/your/script.sh
Kubernetes CronJob
apiVersion: batch/v1
kind: CronJob
metadata:
name: my-cronjob
spec:
schedule: "0 12 * * ? *"
jobTemplate:
spec:
template:
spec:
containers:
- name: my-job
image: my-image
restartPolicy: OnFailure
GitHub Actions
on:
schedule:
- cron: '0 12 * * ? *'
Node.js (node-cron)
const cron = require('node-cron');
cron.schedule('0 12 * * ? *', () => {
console.log('Running scheduled task');
});
Frequently Asked Questions
What does the cron expression 0 12 * * ? * mean?
AWS CloudWatch Events cron expression 0 12 * * ? *. Note the 6-field format.
How do I test 0 12 * * ? * cron expression?
Use our free Cron Expression Tester to validate 0 12 * * ? *. Enter the expression, see the next execution times, and verify it matches your expected schedule.
What timezone does 0 12 * * ? * run in?
Cron expressions use the system timezone by default. For servers, this is typically UTC. Always verify your server's timezone with 'timedatectl' or check your cron daemon configuration.
Can I use 0 12 * * ? * in Kubernetes?
Yes, Kubernetes CronJobs support standard 5-field cron expressions like 0 12 * * ? *. Add it to your CronJob spec.schedule field.
How many times does 0 12 * * ? * run per day?
Variable schedule
Related Cron Expressions
More Cron Tools
GetDevUtils offers a suite of developer tools including:
- Cron Expression Tester - Validate and test cron expressions
- Unix Timestamp Converter - Convert timestamps
- JSON Formatter - Format and validate JSON
- Regex Tester - Test regular expressions