Which time zone is my form set to? And can I change it?

I am running a contest (LA Philharmonic: Caroline Shaw/Beethoven 8/29 Giveaway) that includes entering your name and email address by this Friday at 11:59pm. That's when I set the Jotform to end. 

I'd like to set it for 11:59pm Pacific Time, but I don't see any setting options in my form where I can specify the time zone, and now I'm concerned that - since the account was set up by one of my New York colleagues - the contest might end 3 hours prematurely. 

Is there an option to specify the time zone for a particular form? 

Here is the form in question: https://form.jotform.com/92257831654160

I've also attached a screenshot of the relevant settings page.

Hi!

You are right, there's no specific option to set a timezone for form. Form will capture the time/date from a device where it is loaded. So, you can set the disable date you need in settings and users will see it disabled at 11:59pm of their timezone.