![]() ![]() The term time zone is often confused with local time. The words “daylight” or “summer” are then usually included in the name, and the local time is usually set forward 1 hour.įor example, California uses Pacific Daylight Time (PDT) during the DST period with a UTC offset of UTC-7, but Pacific Standard Time (PST) with an offset of UTC-8 during the rest of the year. Daylight Saving Time Zonesĭuring Daylight Saving Time (DST) the time zone name and time changes. Also, several time zones are only 30 or 45 minutes apart, increasing the total number of standard time zones even further. ![]() However, the International Date Line (IDL) creates 3 more. If each time zone were 1 hour apart, there would be 24 in the world. Our Time Zone Map shows all current time zones. Business Date to Date (exclude holidays).In some cases, time zone borders and DST can be a political tool, most recently in Russia, Ukraine, and North Korea. In most countries, the political decision to make adjustments regarding time zones or DST is made for practical reasons, like saving energy, facilitating trade with neighboring areas, or boost tourism. Time zone names worldwide Hot Political Potato In many parts of the world, especially in countries with only one time zone, time zone names are not commonly used at all. ![]() For example, India Standard Time (IST) and Israel Standard Time (IST) have the same abbreviation, but completely different UTC offsets of UTC+5:30 and UTC+2:00. Learn how to use military time Identical AbbreviationsĪnother point that can cause confusion is that some time zone's names in totally different places have exactly the same abbreviation. J (Juliet Time Zone) is occasionally used to refer to the observer's local time. The reason there are 25 military time zones instead of 24 is that Mike Time Zone (M) and Yankee Time Zone (Y) are the same time, but on either side of the International Date Line. and are used in aviation, at sea, and in telecommunications. These are named according to the NATO phonetic alphabet: Alpha, Bravo, Charlie, etc. There are also 25 military time zones which follow the rule of 1 hour per 15 degrees longitude. In Havana, Cuba, the standard time zone is also UTC-5, but it's called Cuba Standard Time (CST). The time zone names may be completely different, even though the UTC offset is the same.įor instance in Miami, Florida, is 5 hours behind UTC (UTC-5) and the standard time zone is Eastern Standard Time (EST). To confuse matters more, each time zone can have different local time zone names, usually linked to the geographical name of the country or region. The formal name for Central Time in the US is either Central Standard Time or Central Daylight Time. However, Arizona's local time is always UTC-7, because there's no DST in Arizona, and they remain on standard time all year. The reason is that California's local time during DST is UTC-7, but the standard time in California is minus one more hour: UTC-8. For instance, during DST, it is common to say “California and Arizona are now in the same time zone.” However, the correct thing to say would be: “California and Arizona now have the same local time.” The term time zone is often used instead of local time. The areas that don't use DST remain on standard time zone all year.įor example, California uses Pacific Daylight Time (PDT) during the DST period, but Pacific Standard Time (PST) during the rest of the year. The words “daylight” or “summer” are then usually included in the time zone name. Regions that use Daylight Saving Time (DST) change the time zone name and time during the DST period. This makes the total number of time zones worldwide much higher. Also, the International Date Line (IDL), creates 3 time zones and several time zones are only 30 and 45 minutes apart. However, the actual borders on the time zone map have been drawn to match up with both internal and international borders, and rarely match up exactly with the 15-degree longitudes. ![]() Interactive Time Zone Map More Than 24 Time Zones The offset is expressed as either UTC- or UTC+ and the number of hours and minutes. UTC time changes 1 hour forward and backward corresponding to a 1-hour difference in mean solar time for every 15 degrees east or west of the prime meridian (0° longitude) in Greenwich, London, United Kingdom. The local time within a time zone is defined by its offset (difference) from Coordinated Universal Time (UTC), the world's time standard.
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