Military Time Zone Designations

Time difference (offset) relative to Greenwich Mean Time (GMT)

Tables with time zones east and west of Greenwich

There are 25 integer world time zones from -12 through 0 (GMT) to +12. Each one is 15° of longitude as measured East and West from the Prime Meridian at Greenwich, England.

Each of the standard time zones is measured relative to the Greenwich Meridian. Time zones have both civilian designations and military designations. Civilian ones use typically three letter abbreviations (e.g. EST for Eastern Time) for most time zones. Military designations use each letter of the alphabet (except 'J', which is not used) and are known by their phonetic equivalent.

A - M are for time zones to the east of the Prime Meridian at Greenwich.
N - Y are for time zones to the West of Greenwich.

Zulu Time (Z) is Greenwich Mean Time (GMT).



LIVE CLOCKS FOR ALL 25 GMT OFFSETS

Our creative collection

City Time
World Cities Time
Sun Time
Season progress
Liquid Time
Digital Hourglass
Related Pages
Greenwich Mean Time
Time Zones
Daylight Saving Time
GMT to
Time Gadgets
Longest Day
BBC pips
Bristol Time
British Summer Time
BST FAQs
Columbus
Meridian Conference
Current Time
Daylight Saving Time
Days
Global Time
GMT
ISO Date / Time
Leap Second
Mardi Gras
Millennium
Months
Natal Charts
Navy
AM and PM
Network Time Protocol
Oxford Time
Pangchang
Prime Meridian
Railway Time
Roman Numerals IV & IIII
Atomic Time
Second
SI Unit of Time
Sundials
Uses of GMT
Greenwich Time Ball
Time FAQs
Time Websites
Time Zones Table
Time Zones History
Summer Time
World Time Zones Map
UTC
Zulu Time
Tell us if you found a problem