Issue in changing calendar value for a job

Hello,

I have been facing some issue changing the calendar of some jobs to a custom calendar . Current value is default and I changed it to calendar ?xyz? but after the whole wizard is done, it still shows me the value for calendar = defualt.what could possibly be wrong?

Please help.

I didn't find the right solution from the Internet.

References:-
https://www.softtreetech.com/support/phpBB2/viewtopic.php?t=25021
Motion graphics video animation company (https://jobs.vidzzy.com/hire-motion-graphics-video-animation-company/)

Thanks