Canvas Data 2 - Not all courses have time_zone property

[pgentry]

Hello!  I'm doing some time calculations and wanted to use the time_zone from the courses but I am finding a lot of courses that don't have the time_zone property in the JSON but when I look at the course in Canvas it does have a time zone set.  Has anyone else encountered this? 

[pgentry]

I think I have found it actually is true that the time zone wasn't set - and it is defaulting to pacific time in the UI.