Cron Job Every 4 Months On Day 29 Of The Month (Crontab)

This page will help you quickly and easily set up a cron job to run every 4 months on day 29 of the month.

The Cron Job/Crontab

To have your task run at this frequency, use the following cron:

0 0 29 */4 *

This cron command translates to the following (in Human-Readable format):

“Every 4 months on day 29 of the month.”

What is a Cron Job & Crontab?

A cron job is a task that is scheduled to run at a specific time or interval. Cron jobs are commonly used to automate system maintenance or administration tasks, such as running backups or sending emails.

The crontab is a file that contains instructions for the cron daemon. The crontab is typically edited using the crontab command.

Cron Fields

Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 4 months on day 29 of the month“:

  • Field 1: (0) indicates that the task will be run at minute 0.
  • Field 2: (0) indicates that the task will be run at hour 0 (12 am).
  • Field 3: (29) indicates that the task will be run on day 29 of every month.
  • Field 4: (*/4) indicates that the task will be run every 4 months.
  • Field 5: (*) indicates that the task will be run every day of the week.
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    FUN FACT: Cron jobs are used to schedule commands or scripts to run automatically at a specified time and date..

    Use Cases

    You might want to set up a crontab or cron job to run every 4 months on day 29 of the month for several reasons, including:

    • To update a software license that expires every 4 months
    • To send a reminder email to renew a subscription that expires every 4 months
    • To run a script to generate reports on the 29th day of every 4th month

    Similar Cron Jobs

    You might also want to run a crontab:

    FUN FACT: When troubleshooting issues with cron jobs, it can be helpful to run them manually from the command line – this will allow you to see any error messages that might be generated..

    Wrapping Up

    In this article, you learned how to set up a cron job that runs every 4 months on day 29 of the month. Please share this page with friends and colleagues if you find it useful.

    If you have any questions, please don’t hesitate to comment below.

    If you are looking for cron jobs that run at certain minutes, hours, days, weekdays, or months, or if you are looking for miscellaneous cron jobs, then check out our relevant sections, or visit our cron job cheat sheet for a list of hundreds of popular cron jobs.

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