Einstime

You can set Einstime to display the standard Gregorian calendar, the Jewish calendar, or a hybrid of the two. Especially impressive is the World Almanac, which visually represents available sunlight worldwide (that is, a sweeping beam of light and shadow indicates where on Earth it is day and where it is night) and the positions of the sun and moon with reference to the globe and your personal location.

Einstime will also track your appointments and calendar across multiple time zones, as needed.

--Leigh Anne Jones