World Time Zones And Idl

World Time Zones • World has been divided into 24 time zones • GMT or UTC is the beginning of the 24hrs GMT (Greenwich mean time) : LT in Greenwich village in Great Britain which a is at 0 degree Longitude (meridian) 12 time zones are EAST of GMT(+) 12 time zones are WEST of GMT(-)

Calculation of time difference 1. Obtain the local timing of the compared cities 2. Convert them to the GMT/UTC 3. Obtain East (+) or West(-) timings And if: A. Both cities are (+)i.e. ahead of GMT Or both the cities or behind(-) of GMT, Deduct the small from the larger B. If one is ahead(+) and the other is behind of GMT(-),Add both figure together

International Date Line (IDL) • Crossing IDL from West to East:

Gain a Day • Crossing IDL from East to West:

Lose a Day

Jet Lag • The Fatigue and related symptoms, experienced while taking long air journey and crossing multiple time zones. • The internal clock of the body get confused when time zone changes quickly • To overcome the Jet lag. Rest is required Thumb Rule :One day for each Time Zone