Cron expression: on the 1st and 15th

Open in the Cron Expression Generator →

What 0 0 1,15 * * means

Cron reads five fields from left to right: minute, hour, day of the month, month and day of the week. For on the 1st and 15th they are:

Next runs

Calculated in your browser for your time zone. On a server, cron uses the server’s time zone (often UTC).

1. Enable JavaScript to see the next run times.

Typical uses

• Twice-monthly payroll
• Semi-monthly reports

Use it in crontab, GitHub Actions, Kubernetes and Node.js

crontab (crontab -e):

0 0 1,15 * * /usr/local/bin/my-job.sh >> /var/log/my-job.log 2>&1

GitHub Actions (times are UTC):

on:
  schedule:
    - cron: '0 0 1,15 * *'

Kubernetes CronJob:

apiVersion: batch/v1
kind: CronJob
metadata:
  name: my-job
spec:
  schedule: "0 0 1,15 * *"
  concurrencyPolicy: Forbid
  jobTemplate:
    spec:
      template:
        spec:
          restartPolicy: OnFailure
          containers:
            - name: my-job
              image: alpine:3
              command: ["sh", "-c", "echo running"]

Node.js (node-cron):

import cron from 'node-cron';
cron.schedule('0 0 1,15 * *', () => {
  // your job
});

Related schedules

• Every month — 0 0 1 * *
• On the 15th of every month — 0 0 15 * *
• Every quarter — 0 0 1 1,4,7,10 *
• Every 6 months — 0 0 1 1,7 *
• Every year — 0 0 1 1 *
• On the last day of the month — 0 0 28-31 * *
• On the first Monday of the month — 0 9 1-7 * *