How to execute a script every 1st Saturday and 3rd Saturday of a month

I have a requirement to execute a script every 1st Saturday and 3rd Saturday at 8.30 AM. I am new to using the cron job in Linux. Please let me know if the following will work.

30 8 1-7,14-20 * * [ `date +\%u` = 6 ] && /path/to/myscript

Taking into consideration

• First Saturday falls between 1 - 7
• Third Saturday falls between 14 - 20

The cron job should run on every one of those days and immediately exit if it's not Saturday.

Please advise.

You can probably simplify this down to:

30 8 1-7,14-20 * 6 /bin/bash /path/to/script

As per Crontab.guru, this will run At 08:30 on every day-of-month from 1 through 7 and every day-of-month from 14 through 20 and on Saturday.