If today is the first of March and a shipment is due in 120 days, what date will that be? The Julian Calendar makes it easy to calculate. March 1st is day 60 plus 120 days = day 180 or June 29.
This one map (JPEG image 2719 x 1454 pixels) takes a while to download but outlines all the time zones in the world.
Wondering if a holiday will affect your international communications and commerce? The PRN International site lists 230 countries and 2,700 holidays in an easy to access format.
This is a handy tool. Enter where you are calling from (country & state) and where you are calling to (country & providence/state) and then click START SEARCH. The results outline the date AND time difference AND the international dialing codes.