Detailed map (source Wikipedia) :
There are 42 time zones (UTC : Coordinated Universal Time) :
| Time zone | Letter | Other designations |
|---|---|---|
| UTC - 12 | Y (Yankee) | IDLW, International Date Line West |
| UTC - 11 | X (X-ray) | SST, Samoa Standard Time |
| UTC - 10 | W (Whiskey) | HST, Hawaii-Aleutian Standard Time |
| UTC - 9h30 | MIT, Marquesas Islands Time | |
| UTC - 9 | V (Victor) | AKST, Alaska Standard Time |
| UTC - 8 | U (Uniform) | PST, Pacific Standard Time |
| UTC - 7 | T (Tango) | MST, Mountain Standard Time (the Rocky Mountains) |
| UTC - 6 | S (Sierra) | CST, Central Standard Time |
| UTC - 5 | R (Romeo) | EST, Eastern Standard Time |
| UTC - 4h30 | VST, Venezuela Standard Time | |
| UTC - 4 | Q (Quebec) | AST, Atlantic Standard Time |
| UTC - 3h30 | NST, Newfoundland Standard Time | |
| UTC - 3 | P (Papa) | ADT, Atlantic Daylight Time |
| UTC - 2h30 | NDT, Newfoundland Daylight Time | |
| UTC - 2 | O (Oscar) | AT, Azores Time |
| UTC - 1 | N (November) | WAT, West Africa Time |
| UTC | Z (Zulu) | GMT, Greenwich Mean Time WET, Western Europe Time Z, Zulu Time (by the pronunciation of Z in phonetic alphabet, Z being the letter assigned to the zero nautical time zone) |
| UTC + 1 | A (Alfa) | CET, Central Europe Time |
| UTC + 2 | B (Bravo) | CEDT, Central Europe Daylight Time EET, Eastern Europe Time USZ1, Kaliningrad Time (in Russia) |
| UTC + 3 | C (Charlie) | EEST, Eastern Europe Summer Time MSK, Moscow Time (in Russia) |
| UTC + 3h30 | IRST, Iran Standard Time | |
| UTC + 4 | D (Delta) | SAMT, Samara Time (in Russia) |
| UTC + 4h30 | AFT, Afghanistan Time | |
| UTC + 5 | E (Echo) | YEKT, Yekaterinburg Time (in Russia) |
| UTC + 5h30 | IST, Indian Standard Time | |
| UTC + 5h45 | NPT, Nepal Time | |
| UTC + 6 | F (Foxtrot) | OMST, Omsk Time (in Russia) |
| UTC + 6h30 | MMT, Myanmar Time | |
| UTC + 7 | G (Golf) | KRAT, Krasnoyarsk Time (in Russia) |
| UTC + 8 | H (Hotel) | AWST, Australian Western Standard Time IRKT, Irkutsk Time (in Russia) |
| UTC + 8h45 | ACWST, Australian Central Western Standard Time CWT, Central Western Time (in Australia) |
|
| UTC + 9 | I (India) | JST, Japan Standard Time |
| UTC + 9h30 | ACST, Australian Central Standard Time | |
| UTC + 10 | K (Kilo) | AEST, Australian Eastern Standard Time GST, Guam Standard Time VLAT, Vladivostok Time (in Russia) |
| UTC + 10h30 | ACDT, Australian Central Daylight Time | |
| UTC + 11 | L (Lima) | AEDT, Australian Eastern Daylight Time IDLE, International Date Line East MAGT, Magadan Time (in Russia) |
| UTC + 11h30 | NFT, Norfolk Island Time | |
| UTC + 12 | M (Mike) | NZST, New Zealand Standard Time PETT, Petropavlovsk Time or Kamchatka Time (in Russia) |
| UTC + 12h45 | CHAST, Chatham Islands Standard Time (in New Zealand) | |
| UTC + 13 | PHOT, Phoenix Islands Time | |
| UTC + 13h45 | CHADT, Chatham Islands Daylight Time | |
| UTC + 14 | LINT, Line Islands Time |