I see no option to change other than GMT in your drop down box?

Currently I am trying to change the time in my profile from GMT to CST, but I see no option to change other than GMT in your drop down box?  How do I change to CST or which GMT option do I choose to make it aligned with with GMT?  

Thanks

You can find your location to change the Time Zone on the Account Settings page. Here's a screenshot:

I hope this helps. You can also try using CST converter to GMT if you did not find your location in the Drop down menu.

Let us know how it goes.