Cron Job Every 1 Day At 9:30 pm (Crontab)

This page will help you quickly and easily set up a cron job to run every 1 day at 9:30 pm.

The Cron Job/Crontab

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

30 21 * * *

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

“Every 1 day at 9:30 pm.”

What is a Cron Job & Crontab?

A cron job is a task that is scheduled to run at a specified time or interval. Cron jobs are typically used to perform system maintenance or administration tasks, such as backing up data or generating reports.

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 1 day at 9:30 pm“:

  • Field 1: (30) indicates that the task will be run at minute 30.
  • Field 2: (21) indicates that the task will be run at hour 21 (9 pm).
  • Field 3: (*) indicates that the task will be run every day of the month.
  • Field 4: (*) indicates that the task will be run every month.
  • Field 5: (*) indicates that the task will be run every day of the week.
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    FUN FACT: Cron jobs are named after the Greek god of time, Chronos – so now you know where the name comes from!.

    Use Cases

    You might want to set up a crontab or cron job to run every 1 day at 9:30 pm for several reasons, including:

    • Generate a report on website activity for the day and email it to the webmaster
    • Run a script to backup the database
    • Delete temporary files that are more than 30 days old

    Similar Cron Jobs

    You might also want to run a crontab:

    FUN FACT: Cron jobs can be used to automate just about any task that needs to be performed regularly – so get creative and see what you can come up with!.

    Wrapping Up

    In this article, you learned how to set up a cron job that runs every 1 day at 9:30 pm. 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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