It's called "floating" time. It means ignore the time zone completely and just display it as 4pm always. Alerts and whatnot would be based on your computer's cu

It's called "floating" time. It means ignore the time zone completely and just display it as 4pm always. Alerts and whatnot would be based on your computer's current time zone, so if your computer is in PDT, it would display the alert at 4pm PDT, but if you set your computer to EST it would display it at 4pm EST instead.