Schedule timing checker
Give it a cron schedule. Get a plain-English meaning, the next run times, and any silent mistakes that stop or repeat it.
Schedule timing checker is a free AI skill for the job "Test and fix code". Give the instructions to an AI assistant that supports the required files and tools, then review its output.
Free · No account · CC BY 4.0 licence · Made by sickn33 · Thinking: low
Made by sickn33. See the original on GitHub; we copied it as it is, with its licence.
What it does
Find out what your cron schedule will really do before it ships. Paste the expression and get a plain English meaning, the next run times and any silent mistakes that stop it or make it run too often. It splits the five fields and checks each range. Then it hunts for traps: dates that never exist, like 30 February; day-of-month and day-of-week joined by OR, which fires far more than you meant; and midnight times shifted by time zones. A small Node script that needs no install parses the line, validates it deeply and lists upcoming runs with a yearly count. It suits crontabs, Kubernetes, GitHub Actions and Airflow.
You give it
- The cron expression or file
- The time zone it runs in (optional)
- Where it is used, such as Kubernetes (optional)
You get
- A plain English meaning
- The next run times
- A list of silent mistakes found
- A corrected expression
Use it when
- A job did not fire and you cannot see why.
- You are about to deploy a CronJob and want to check its timing.
- You need to know how many times a year a schedule runs.
- You inherited a crontab and want it explained.
How to use it
- Add it to your AI once: download it and add the folder to Claude, ChatGPT or Codex as a skill.
- Ask for the job in your own words. Your AI opens the skill when it fits.
- It works best when your AI can run code.