* Support crossing the international date line. It now figures out which direction is closer and adjusts in that direction. This means, for example, that going from Auckland GMT+13 to London UTC via Dubai will actually shift time the opposite way to your direction of travel, as 11 hours is less than 13.
* Added an information panel, which displays useful information about the calculations.
* Pressing on the origin and destination panels now opens the preferences. Thank you Aisha!