Event repeat every six days

Hi haroon198,

Welcome to the Apple Support Communities!

We understand that you'd like to set up a repeating calendar. If you're using a Mac, you can follow the steps outlined here to do so: Set up or delete a repeating event in Calendar on Mac

We hope this helps.

Take care!

Thanks for letting us know, haroon198,

You can also create repeat events on your iPhone in the Calendar app. You can learn more here: Create and edit events in Calendar on iPhone

Cheers!