The time zones are shown as UTC which are the coordinated universal time with start of 0 in the middel.

 

+12-11-10-9-8-7-6-5-4-3-2-1- 0 +1+2+3+4+5+6+7+8+9+10+11-12

 

AM After midnight PM Past midday. Made for flights, ships, travel, earth and space