Skip to content
IP 19216811.blog
Cron Reference

Every 15 Minutes

Runs four times per hour, every day.

Cron Expression

*/15 * * * * Test in tool

Every 15 minutes

Expression Breakdown

Minute Hour Day Month Weekday
*/15 * * * *
every 15 any any any any

Next 5 Scheduled Runs

  • Saturday, June 13 2026 at 9:00 PM
  • Saturday, June 13 2026 at 9:15 PM
  • Saturday, June 13 2026 at 9:30 PM
  • Saturday, June 13 2026 at 9:45 PM
  • Saturday, June 13 2026 at 10:00 PM

Times are relative to the server's local clock at page load.

Common Use Cases

  • Report generation and aggregation
  • Rate-limited API polling
  • Data ingestion pipelines

How to Install

Linux / macOS (crontab)

Run crontab -e and add this line:

*/15 * * * * /path/to/your/script.sh

Python (APScheduler / cron-style)

scheduler.add_job(my_func, 'cron',
    minute='*/15',
    hour='*',
    day='*',
    month='*',
    day_of_week='*')

GitHub Actions (schedule)

on:
  schedule:
    - cron: '*/15 * * * *'

Frequently Asked Questions

What does */15 * * * * mean?
The job fires at minutes 0, 15, 30, and 45 of every hour — four times an hour.
How many times per day does a 15-minute cron run?
4 times per hour × 24 hours = 96 times per day.