UTC+07 is an identifier for a time offset from UTC of +07. Also known as Indochina Time (ICT), it is used in:
As standard time (all year round)
- Indonesia (Western)
- Mongolia (Far Western)
As standard time (Northern Hemisphere winter only)
As daylight saving time (Northern Hemisphere summer)
It is considered the westernmost time zone in East Asia.
Discrepancies between official UTC+07 and geographical UTC+07
Since legal, political and economic in addition to physical or geographical criteria are used in the drawing of time zones, it follows that official time zones do not precisely adhere to meridian lines. The UTC+07 time zone, were it drawn by purely geographical terms, would consist of exactly the area between meridians 97°30′ E and 112°30′ E. As a result, there are Asian locales that despite lying in an area with a "physical" UTC+07 time, actually use another time zone.
Conversely, there are Asian areas that have gone for UTC+07, even though their "physical" time zone is UTC+06 (western most part of Indonesia).
Areas located within UTC+07 longitudes using other time zones
- Parts of China, including Guangxi Province and Hainan Island
- Most of central Mongolia including the capital Ulaanbaatar
- Peninsular Malaysia
- Western part of Borneo Island including the western part of Sarawak, Malaysia
Areas located outside UTC+07 longitudes using UTC+07 time
Areas between 82°30′ W and 97°30′ E ("physical" UTC+06)
- The westernmost part of Indonesia including Banda Aceh.
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