JST to IST to CST to UTC to AEDT to SGT

Time Difference

Japan Standard Time is 3 hours and 30 minutes ahead of India Standard Time and 15 hours ahead of Central Standard Time and 9 hours ahead of Universal Time Coordinated and 2 hours behind Australian Eastern Daylight Time and 1 hour ahead of Singapore Time
4:30 am04:30 in JST is 1:00 am01:00 in IST and is 1:30 pm13:30 in CST and is 7:30 pm19:30 in UTC and is 6:30 am06:30 in AEDT and is 3:30 am03:30 in SGT

JST to IST call time
Best time for a conference call or a meeting is between 11:30am-6pm in JST which corresponds to 8am-2:30pm in IST
JST to CST call time
Best time for a conference call or a meeting is between 8:30pm-10:30pm in JST which corresponds to 5:30am-7:30am in CST
JST to UTC call time
Best time for a conference call or a meeting is between 5pm-7pm in JST which corresponds to 8am-10am in UTC
JST to AEDT call time
Best time for a conference call or a meeting is between 8am-4pm in JST which corresponds to 10am-6pm in AEDT
JST to SGT call time
Best time for a conference call or a meeting is between 9am-6pm in JST which corresponds to 8am-5pm in SGT

4:30 am04:30 Japan Standard Time (JST). Offset UTC +9:00 hours
1:00 am01:00 India Standard Time (IST). Offset UTC +5:30 hours
1:30 pm13:30 Central Standard Time (CST). Offset UTC -6:00 hours
7:30 pm19:30 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
6:30 am06:30 Australian Eastern Daylight Time (AEDT). Offset UTC +11:00 hours
3:30 am03:30 Singapore Time (SGT). Offset UTC +8:00 hours

4:30 am04:30 JST / 1:00 am01:00 IST / 1:30 pm13:30 CST / 7:30 pm19:30 UTC / 6:30 am06:30 AEDT / 3:30 am03:30 SGT

Japan Standard Time

Offset: JST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: Japan

Principal Cities: The largest city in the JST timezone is Tokyo from Japan with population about 8.337 million people. Other major cities in the area are Yokohama, Osaka shi, Nagoya shi, Sapporo

Daylight Saving: Japan Standard Time (JST) is not adjusted for daylight saving therefore JST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, Japan Standard Time remains the same

JST representations, usage and related time zones

India Standard Time

Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: India

Principal Cities: The largest city in the IST timezone is Mumbai from India with population about 12.692 million people. Other major cities in the area are Delhi, Bangalore, Kolkata, Chennai

Daylight Saving: India Standard Time (IST) is not adjusted for daylight saving therefore IST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, India Standard Time remains the same

IST representations, usage and related time zones

Central Standard Time

Offset: CST is 6 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States

Principal Cities: The largest city in the CST timezone is Mexico City from Mexico with population about 12.294 million people. Other major cities in the area are Chicago, Houston, Iztapalapa, Ecatepec

French: HNC - Heure Normale du Centre

Spanish: CT - Tiempo Central Estándar, CT - Zona Centro

Daylight Saving: This is a standard timezone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Central Daylight Time (CDT).

Start: Central Standard Time (CST) started on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually the on first Sunday of November.

End: Central Standard Time (CST) ends on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am local daylight time instead. Standard time starts annually the on second Sunday of March.

CST representations, usage and related time zones

Universal Time Coordinated

Offset: UTC is 0 hours ahead Greenwich Mean Time (GMT) and is used in Universal

Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but is used by the scientific community.
UTC is the time standard commonly used across the world since 1972. It is used in many technical fields, like aviation industry and meteorologists, also used to synchronize time across internet networks.

UTC representations, usage and related time zones

Australian Eastern Daylight Time

Offset: AEDT is 11 hours ahead Greenwich Mean Time (GMT) and is used in Australia

Countries: It is used in following countries: Australia

Principal Cities: The largest city in the AEDT timezone is Sydney from Australia with population about 4.627 million people. Other major cities in the area are Melbourne, Canberra, Newcastle, Wollongong

Daylight Saving: Australian Eastern Daylight Time (AEDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Australian Eastern Standard Time (AEST).

Start: Australian Eastern Daylight Time (AEDT) started on Sunday, October 5, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, October 5, 2025, 3:00 am. Daylight saving starts annually the on first Sunday of October

End: Australian Eastern Daylight Time (AEDT) ends on Sunday, April 5, 2026 at 3:00 am local time and clocks are set one hour back to Sunday, April 5, 2026, 2:00 am local standard time instead. Daylight saving ends annually the on first Sunday of April

Australian Eastern Daylight Time (AEDT) is observer in New South Wales (except Broken Hill and Lord Howe Island), Victoria, Tasmania, Australian Capital Territory, Sydney, Melbourne, Hobart, Canberra AEDT is equal to Coordinated Universal Time plus 11 hours (UTC +11). During a summer time period, these locations move from AEST to Australian Eastern Daylight Time (AEDT), and clocks are advanced to UTC +11.

Daylight saving or summer time is commonly expressed as AEDT (Australian Eastern Daylight Time). In periods of daylight saving an hour is added to the Local Standard Time.

The regulation of time is a State Government responsibility. Changes to the period of daylight saving may be made by regulation. Legislation to harmonise daylight saving in NSW with the south-eastern states and the ACT was passed by the NSW Parliament on 23 October 2007.

History of daylight saving in New South Wales
Daylight saving operated nationally for single summer during World War I from 1 January 1917 to 25 March 1917 and during World War II for three summers in a row, starting on 1 January 1942. Daylight saving was re-introduced for third time in New South Wales on 31 October 1971 after New South Wales Parliament passed the Standard Time Act 1971. A referendum held on 1 May 1976 proposed that daylight saving should be on a permanent basis. The ballot paper stated: "At present there is a period commonly called 'daylight saving' by which time is advanced by one hour for the period commencing on the last Sunday in October in each year and ending on the first Sunday in March in the following year. Electors were then asked to answer YES or NO to the question: Are you in favour of daylight saving? 1,882,770 electors were in favour, 868,900 were against and 35,507 votes were informal.\" The period of daylight saving is prescribed by the Daylight Saving Regulations 2008, made under the Daylight Saving Act 2007. Since April 2008, daylight saving has been synchronised across Tasmania, New South Wales, Victoria, the ACT and South Australia, although South Australia remains half an hour behind throughout the year due to the observance of Australian Central Standard Time.

Which is correct Daylight Savings or Daylight Saving (with or without the 's' at the end)? The correct spelling in Australia is without the 's'.

AEDT representations, usage and related time zones

Singapore Time

Offset: SGT is 8 hours ahead Greenwich Mean Time (GMT) and is used in Asia

SGT representations, usage and related time zones