We do this in all of our web apps. It's pretty simple and dramatically improves UX when you have customers that are doing a lot of scheduling. Showing both at

We do this in all of our web apps. It's pretty simple and dramatically improves UX when you have customers that are doing a lot of scheduling. Showing both at the same time is peak design for me personally. UTC compares for relative sequencing, local time for "was that before or after I ate lunch".