I force everything to 24hr UTC time on projects I'm involved with. Then if it's a technical project, display it as 24hr with timezones and if it's not technica

I force everything to 24hr UTC time on projects I'm involved with. Then if it's a technical project, display it as 24hr with timezones and if it's not technical then apply all these strange time display rules as user configurable. Solves so many problems. Now, Django supports this pretty cleanly so it's often pretty easy to enforce and work with.