World Time Zones
Definition of time zones
A time zone item specifies an international time zone, indicated by
a small set of letters.
Military time zone designations use a single letter (except j). Zulu
Time (z) is Greenwich Mean Time (GMT).
Here are the most common standard-time time zones, indexed by the zone hour
value.
Time Zones West of Greenwich
GMT
offset |
Time Zone Abbreviations |
Military
Time
Zone |
| -0:00 |
GMT =
Greenwich Mean Time
UT or UTC for Universal (Coordinated) Time
WET for Western European Time |
z |
| -1:00 |
WAT = West Africa Time |
a |
| -2:00 |
AT = Azores Time |
b |
| -3:00 |
|
c |
| -4:00 |
AST = Atlantic Standard Time (Canada) |
d |
| -5:00 |
EST =
Eastern Standard Time
(USA & Canada) |
e |
| -6:00 |
CST =
Central Standard Time
(USA & Canada) |
f |
| -7:00 |
MST =
Mountain Standard
Time (USA & Canada) |
g |
| -8:00 |
PST =
Pacific Standard Time
(USA & Canada) |
h |
| -9:00 |
AKST Alaska
Standard Time (USA)
YST = Yukon Standard Time (Canada) |
i |
| -10:00 |
HST = Hawaii Standard Time
HAST Hawaii-Aleutian Standard Time (USA)
AHST = Alaska-Hawaii Standard Time (obs)
CAT = Central Alaska Time |
k |
| -11:00 |
NT = Nome Time |
l |
| -12:00 |
IDLW = International Date Line West |
m |
Time Zones East of Greenwich
GMT
offset |
Time Zone Abbreviations |
Military
Time
Zone |
| +1:00 |
CET =
Central European Time
FWT = French Winter Time (France)
MET = Middle European Time
MEWT = Middle European Winter Time
SWT = Swedish Winter Time (Sweden) |
n |
| +2:00 |
EET = Eastern European Time, USSR Zone 1 |
o |
| +3:00 |
BT = Baghdad Time, USSR Zone 2 |
p |
| +4:00 |
ZP4 = USSR Zone 3 |
q |
| +5:00 |
ZP5 = USSR Zone 4. |
r |
| +6:00 |
ZP6 = USSR Zone 5. |
s |
| +7:00 |
CXT = Christmas Island Time (Australia) |
t |
| +8:00 |
CCT = China Coast Time, USSR Zone 7
AWST = Australian Western Standard Time
WST = Western Standard Time (Australia) |
u |
| +9:00 |
JST = Japan
Standard Time, USSR Zone 8 |
v |
| +10:00 |
EAST = East Australian Standard Time
EST = Eastern Standard Time (Australia)
GST = Guam Standard Time, USSR Zone 9 |
w |
| +11:00 |
|
x |
| +12:00 |
IDLE = International Date Line East
NZST = New Zealand Standard Time
NZT = New Zealand Time |
y |
Here are many Daylight Saving Time (DST) time zones, indexed by the zone hour
value.
GMT
offset |
Time Zone Abbreviations |
Military
Time
Zone |
| -3:00 |
ADT = Atlantic Daylight Time (Canada) |
c |
| -4:00 |
EDT = Eastern Daylight Time (USA & Canada) |
d |
| -5:00 |
CDT = Central Daylight Time (USA & Canada) |
e |
| -6:00 |
MDT = Mountain Daylight Time (USA & Canada) |
f |
| -7:00 |
PDT = Pacific Daylight Time (USA & Canada) |
g |
| -8:00 |
AKDT = Alaska Daylight Time (USA)
YDT = Yukon Daylight Time (Canada)
HADT = Hawaii-Aleutian Daylight Time (USA) |
h |
| -9:00 |
HDT = Hawaii Daylight Time (USA) |
i |
GMT
offset |
Time Zone Abbreviations |
Military
Time
Zone |
| +1:00 |
BST = British Summer Time (UK)
IST = Irish Summer Time (Ireland)
WEDT = Western European Daylight Time
WEST Western European Summer Time |
n |
| +2:00 |
CEDT = Central European Daylight Time
CEST = Central European Summer Time
MEST = Middle European Summer Time
MESZ = Middle European Summer Time
SST = Swedish Summer Time (Sweden)
FST = French Summer Time (France) |
o |
| +3:00 |
EEDT = Eastern European Daylight Time
EEST Eastern European Summer Time |
p |
| +8:00 |
WADT = West Australian Daylight Time |
|
| +11:00 |
EADT = Eastern Australian Daylight Time
EST = Eastern Summer (Daylight) Time (Australia) |
x |
| +13:00 |
NZDT = New Zealand Daylight Time |
n/a |
French Time Zone Abbreviations
HAA = Heure Avancée de l'Atlantique GMT-3
HAC = Heure Avancée du Centre GMT-5
HAE = Heure Avancée de l'Est GMT-4
HAP = Heure Avancée du Pacifique GMT-7
HAR = Heure Avancée des Rocheuses GMT-6
HAT = Heure Avancée de Terre-Neuve GMT-2:30
HAY = Heure Avancée du Yukon GMT-8
HNA = Heure Normale de l'Atlantique GMT-4
HNC = Heure Normale du Centre GMT-6
HNE = Heure Normale de l'Est GMT-5
HNP = Heure Normale du Pacifique GMT-8
HNR = Heure Normale des Rocheuses GMT-7
HNT = Heure Normale de Terre-Neuve GMT-3:30
HNY = Heure Normale du Yukon GMT-9
German Time Zone Abbreviations
MESZ = Mitteleuropäische Sommerzeit GMT+2
MEZ = Mitteleuropäische Zeit GMT+1
Non-standard Time Zones
ACDT Australian Central Daylight Time Australia GMT+10:30
ACST Australian Central Standard Time Australia GMT+9:30
CST Central Summer (Daylight) Time Australia GMT+10:30
CST Central Standard Time Australia GMT+9:30
IST = India Standard Time
GMT+5:30
NDT Newfoundland Daylight Time (Canada) GMT-2:30
NFT Norfolk (Island) Time (Australia) GMT+11:30
NST Newfoundland Standard Time (Canada) GMT-3:30
Military Time Zones
The hourly zones are used by the military are referred to by a letter of the
alphabet (or their phonetic equivalent).
The letter J is not used.
The other 25 letters cover the 12 time zones to the east of Greenwich and the 12
time zones to the west of Greenwich. The 25th zone is Z (Zulu) for GMT / UTC.
A - M are for time zones to the East of Greenwich
N - Y are for time zones to the West of Greenwich.
| 
