AWST
Australian Western Standard Time
GMT +8
Tue, Jul 13
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CST
China Standard Time
GMT +8
Tue, Jul 13
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CDT/CST
Central Daylight Time
GMT -5
Tue, Jul 13
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CST is not used on this date
This converter uses CDT (GMT -5), the offset Chicago uses on this date. Open the CDT converter.
EDT
Eastern Daylight Time
GMT -4
Tue, Jul 13
12am
3am
6am
9am
12pm
3pm
6pm
9pm
ART
Argentina Time
GMT -3
Tue, Jul 13
12am
3am
6am
9am
12pm
3pm
6pm
9pm
EEST/EET
Eastern European Summer Time
GMT +3
Tue, Jul 13
12am
3am
6am
9am
12pm
3pm
6pm
9pm
EET is not used on this date
This converter uses EEST (GMT +3), the offset Kiev uses on this date. Open the EEST converter.
CEST/CET
Central European Summer Time
GMT +2
Tue, Jul 13
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CET is not used on this date
This converter uses CEST (GMT +2), the offset Berlin uses on this date. Open the CEST converter.

Compare AWST time with CST, CST, EDT, ART, EET, and CET time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Australian Western Standard Time is 0 hours ahead of China Standard Time and 13 hours ahead of Central Daylight Time and 12 hours ahead of Eastern Daylight Time and 11 hours ahead of Argentina Time and 5 hours ahead of Eastern European Summer Time and 6 hours ahead of Central European Summer Time
3:00 pm15:00 in AWST is 3:00 pm15:00 in CST and is 2:00 am02:00 in CDT and is 3:00 am03:00 in EDT and is 4:00 am04:00 in ART and is 10:00 am10:00 in EEST and is 9:00 am09:00 in CEST

AWST to CST call time
Best time for a conference call or a meeting is between 9am-5pm in AWST which corresponds to 9am-5pm in CST
AWST to CDT call time
Best time for a conference call or a meeting is between 7am-8am in AWST which corresponds to 6pm-7pm in CDT (previous day)
AWST to EDT call time
Best time for a conference call or a meeting is between 7pm-8pm in AWST which corresponds to 7am-8am in EDT
AWST to ART call time
Best time for a conference call or a meeting is between 6pm-7pm in AWST which corresponds to 7am-8am in ART
AWST to EEST call time
Best time for a conference call or a meeting is between 2pm-5pm in AWST which corresponds to 9am-12pm in EEST
AWST to CEST call time
Best time for a conference call or a meeting is between 3pm-5pm in AWST which corresponds to 9am-11am in CEST

3:00 pm15:00 Australian Western Standard Time (AWST). Offset UTC +8:00 hours
3:00 pm15:00 China Standard Time (CST). Offset UTC +8:00 hours
2:00 am02:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
3:00 am03:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
4:00 am04:00 Argentina Time (ART). Offset UTC -3:00 hours
10:00 am10:00 Eastern European Summer Time (EEST). Offset UTC +3:00 hours
9:00 am09:00 Central European Summer Time (CEST). Offset UTC +2:00 hours

3:00 pm15:00 AWST / 3:00 pm15:00 CST / 2:00 am02:00 CDT / 3:00 am03:00 EDT / 4:00 am04:00 ART / 10:00 am10:00 EEST / 9:00 am09:00 CEST

AWSTCSTCDTEDTARTEESTCEST
12am (midnight)12am (midnight)11am12pm (noon)1pm7pm6pm
1am1am12pm (noon)1pm2pm8pm7pm
2am2am1pm2pm3pm9pm8pm
3am3am2pm3pm4pm10pm9pm
4am4am3pm4pm5pm11pm10pm
5am5am4pm5pm6pm12am (midnight)11pm
6am6am5pm6pm7pm1am12am (midnight)
7am7am6pm7pm8pm2am1am
8am8am7pm8pm9pm3am2am
9am9am8pm9pm10pm4am3am
10am10am9pm10pm11pm5am4am
11am11am10pm11pm12am (midnight)6am5am
12pm (noon)12pm (noon)11pm12am (midnight)1am7am6am
1pm1pm12am (midnight)1am2am8am7am
2pm2pm1am2am3am9am8am
3pm3pm2am3am4am10am9am
4pm4pm3am4am5am11am10am
5pm5pm4am5am6am12pm (noon)11am
6pm6pm5am6am7am1pm12pm (noon)
7pm7pm6am7am8am2pm1pm
8pm8pm7am8am9am3pm2pm
9pm9pm8am9am10am4pm3pm
10pm10pm9am10am11am5pm4pm
11pm11pm10am11am12pm (noon)6pm5pm
00:0000:0011:0012:0013:0019:0018:00
01:0001:0012:0013:0014:0020:0019:00
02:0002:0013:0014:0015:0021:0020:00
03:0003:0014:0015:0016:0022:0021:00
04:0004:0015:0016:0017:0023:0022:00
05:0005:0016:0017:0018:0000:0023:00
06:0006:0017:0018:0019:0001:0000:00
07:0007:0018:0019:0020:0002:0001:00
08:0008:0019:0020:0021:0003:0002:00
09:0009:0020:0021:0022:0004:0003:00
10:0010:0021:0022:0023:0005:0004:00
11:0011:0022:0023:0000:0006:0005:00
12:0012:0023:0000:0001:0007:0006:00
13:0013:0000:0001:0002:0008:0007:00
14:0014:0001:0002:0003:0009:0008:00
15:0015:0002:0003:0004:0010:0009:00
16:0016:0003:0004:0005:0011:0010:00
17:0017:0004:0005:0006:0012:0011:00
18:0018:0005:0006:0007:0013:0012:00
19:0019:0006:0007:0008:0014:0013:00
20:0020:0007:0008:0009:0015:0014:00
21:0021:0008:0009:0010:0016:0015:00
22:0022:0009:0010:0011:0017:0016:00
23:0023:0010:0011:0012:0018:0017:00

Australian Western Standard Time

Offset: AWST is 8 hours ahead Greenwich Mean Time (GMT) and is used in Australia

Countries using this time zone: Australia

Principal Cities: The largest city in the AWST time zone is Perth in Australia, with about 1.897 million people. Other major cities in this time zone include Rockingham, Mandurah, Bunbury, Armadale.

Daylight Saving: Clocks in Australian Western Standard Time (AWST) do not change for daylight saving time, so AWST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.

AWST Time Zone Geo Map
AWST timezone map

AWST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +08 - basic short
  • +0800 - basic
  • +08:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0800 - sign character (+) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Hotel - Military abbreviation for AWST
  • H - short form of 'Hotel'
IANA/Olson: Reflects AWST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Australia/Perth
  • Australia/West
Time zones with the GMT +8 offset:
  • ACT - ASEAN Common Time
  • AWST - Australian Western Standard Time
  • BNT - Brunei Darussalam Time
  • CAST - Casey Time
  • CHOT - Choibalsan Time
  • CST - China Standard Time
  • H - Hotel Time Zone
  • HKT - Hong Kong Time
  • HOVST - Hovd Summer Time
  • IRKT - Irkutsk Time
  • KRAST - Krasnoyarsk Summer Time
  • MYT - Malaysia Time
  • PHT - Philippine Time
  • SGT - Singapore Time
  • ULAT - Ulaanbaatar Time
  • WITA - Central Indonesian Time

China Standard Time

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

Countries using this time zone: China, Macau, Taiwan

Principal Cities: The largest city in the CST time zone is Shanghai in China, with about 14.609 million people. Other major cities in this time zone include Zhumadian, Taipei, Beijing, Nanchong.

Daylight Saving: Clocks in China Standard Time (CST) do not change for daylight saving time, so CST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.

CST Time Zone Geo Map
CST timezone map

CST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +08 - basic short
  • +0800 - basic
  • +08:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0800 - sign character (+) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Hotel - Military abbreviation for CST
  • H - short form of 'Hotel'
IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Chongqing
  • Asia/Chungking
  • Asia/Harbin
  • Asia/Macao
  • Asia/Macau
  • Asia/Shanghai
  • Asia/Taipei
  • PRC
  • ROC
CST Abbreviation: Several time zones share CST abbreviation and it could refer to these time zones
  • Central Standard Time - UTC -6
  • China Standard Time - UTC +8
  • Cuba Standard Time - UTC -5
Time zones with the GMT +8 offset:
  • ACT - ASEAN Common Time
  • AWST - Australian Western Standard Time
  • BNT - Brunei Darussalam Time
  • CAST - Casey Time
  • CHOT - Choibalsan Time
  • CST - China Standard Time
  • H - Hotel Time Zone
  • HKT - Hong Kong Time
  • HOVST - Hovd Summer Time
  • IRKT - Irkutsk Time
  • KRAST - Krasnoyarsk Summer Time
  • MYT - Malaysia Time
  • PHT - Philippine Time
  • SGT - Singapore Time
  • ULAT - Ulaanbaatar Time
  • WITA - Central Indonesian Time

Central Standard Time

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

Countries using this time zone: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador

Principal Cities: The largest city in the CST time zone is Ciudad Juarez in Mexico, with about 1.512 million people. Other major cities in this time zone include Guatemala City, Managua, Tegucigalpa, Chihuahua.

French: HNC - Heure Normale du Centre

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

CST Time Zone Geo Map
CST timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central Daylight Time (CDT).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Central Standard Time (CST) ended on Sunday, March 14, 2021 at 2:00 am local time and clocks were set one hour forward to Sunday, March 14, 2021, 3:00 am local daylight time instead. Standard time ends annually on the second Sunday of March.

Daylight saving time clock moves back for one hour from 2am to 1amStart: Central Standard Time (CST) starts on Sunday, November 7, 2021 at 2:00 am local time and clocks are set one hour back to Sunday, November 7, 2021, 1:00 am. Standard time starts annually on the first Sunday of November.

CST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for CST
  • S - short form of 'Sierra'
IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Bahia_Banderas
  • America/Belize
  • America/Chicago
  • America/Chihuahua
  • America/Costa_Rica
  • America/El_Salvador
  • America/Guatemala
  • America/Indiana/Knox
  • America/Indiana/Tell_City
  • America/Knox_IN
  • America/Managua
  • America/Matamoros
  • America/Menominee
  • America/Merida
  • America/Mexico_City
  • America/Monterrey
  • America/North_Dakota/Beulah
  • America/North_Dakota/Center
  • America/North_Dakota/New_Salem
  • America/Ojinaga
  • America/Rainy_River
  • America/Rankin_Inlet
  • America/Regina
  • America/Resolute
  • America/Swift_Current
  • America/Tegucigalpa
  • America/Winnipeg
  • CST6CDT
  • Canada/Central
  • Canada/Saskatchewan
  • Mexico/General
  • US/Central
  • US/Indiana-Starke
CST Abbreviation: Several time zones share CST abbreviation and it could refer to these time zones
  • Central Standard Time - UTC -6
  • China Standard Time - UTC +8
  • Cuba Standard Time - UTC -5
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone

Eastern Daylight Time

Offset: EDT is 4 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries using this time zone: Bahamas, Canada, Haiti, Turks & Caicos Is, United States

Principal Cities: The largest city in the EDT time zone is New York City in the United States, with about 8.175 million people. Other major cities in this time zone include Toronto, Montreal, Brooklyn, Borough of Queens.

French: HAE - Heure Avancée de l'Est

Spanish: EDT - Tiempo de verano del Este, ET - Zona Sureste

EDT Time Zone Geo Map
EDT timezone map

Daylight Saving: Eastern Daylight Time (EDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Eastern Standard Time (EST).

Daylight saving time clock moves forward for one hour from 2am to 3amStart: Eastern Daylight Time (EDT) started on Sunday, March 14, 2021 at 2:00 am local time and clocks were set one hour forward to Sunday, March 14, 2021, 3:00 am. Daylight saving starts annually on the second Sunday of March

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Eastern Daylight Time (EDT) ends on Sunday, November 7, 2021 at 2:00 am local time and clocks are set one hour back to Sunday, November 7, 2021, 1:00 am local standard time instead. Daylight saving ends annually on the first Sunday of November

EDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -04 - basic short
  • -0400 - basic
  • -04:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Quebec - Military abbreviation for EDT
  • Q - short form of 'Quebec'
IANA/Olson: Reflects EDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Detroit
  • America/Fort_Wayne
  • America/Grand_Turk
  • America/Indiana/Indianapolis
  • America/Indiana/Marengo
  • America/Indiana/Petersburg
  • America/Indiana/Vevay
  • America/Indiana/Vincennes
  • America/Indiana/Winamac
  • America/Indianapolis
  • America/Iqaluit
  • America/Kentucky/Louisville
  • America/Kentucky/Monticello
  • America/Louisville
  • America/Montreal
  • America/Nassau
  • America/New_York
  • America/Nipigon
  • America/Pangnirtung
  • America/Port-au-Prince
  • America/Thunder_Bay
  • America/Toronto
  • Canada/Eastern
  • EST5EDT
  • US/East-Indiana
  • US/Eastern
  • US/Michigan
Time zones with the GMT -4 offset:
  • AST - Atlantic Standard Time
  • EDT - Eastern Daylight Time
  • AMT - Amazon Time
  • BOT - Bolivia Time
  • CDT - Cuba Daylight Time
  • CLT - Chile Standard Time
  • FKT - Falkland Island Time
  • GYT - Guyana Time
  • HLV - Hora Legal de Venezuela
  • PYT - Paraguay Time
  • Q - Quebec Time Zone
  • VET - Venezuelan Standard Time

Argentina Time

Offset: ART is 3 hours behind Greenwich Mean Time (GMT) and is used in South America

Countries using this time zone: Argentina

Principal Cities: The largest city in the ART time zone is Buenos Aires in Argentina, with about 13.076 million people. Other major cities in this time zone include La Plata, Mar del Plata, Quilmes, Moron.

Daylight Saving: Clocks in Argentina Time (ART) do not change for daylight saving time, so ART stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.

ART Time Zone Geo Map
ART timezone map

ART representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -03 - basic short
  • -0300 - basic
  • -03:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates an offset of three hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Papa - Military abbreviation for ART
  • P - short form of 'Papa'
Time zones with the GMT -3 offset:
  • ADT - Atlantic Daylight Time
  • PMT - Pierre & Miquelon Standard Time
  • PMST - Pierre & Miquelon Standard Time
  • AMST - Amazon Summer Time
  • ART - Argentina Time
  • BRT - Brasília time
  • CLST - Chile Summer Time
  • FKST - Falkland Islands Summer Time
  • GFT - French Guiana Time
  • P - Papa Time Zone
  • PYST - Paraguay Summer Time
  • SRT - Suriname Time
  • UYT - Uruguay Time

Eastern European Time

Offset: EET is 2 hours ahead Greenwich Mean Time (GMT) and is used in Europe

Countries using this time zone: Egypt, Libya, Russia

Principal Cities: The largest city in the EET time zone is Cairo in Egypt, with about 7.735 million people. Other major cities in this time zone include Alexandria, Al Jizah, Tripoli, Benghazi.

German: OEZ - Osteuropäische Zeit

EET Time Zone Geo Map
EET timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Eastern European Summer Time (EEST).

Daylight saving time clock moves forward for one hour from 3am to 4amEnd: Eastern European Time (EET) ended on Sunday, March 28, 2021 at 3:00 am local time and clocks were set one hour forward to Sunday, March 28, 2021, 4:00 am local daylight time instead. Standard time ends annually on the last Sunday of March.

Daylight saving time clock moves back for one hour from 4am to 3amStart: Eastern European Time (EET) starts on Sunday, October 31, 2021 at 4:00 am local time and clocks are set one hour back to Sunday, October 31, 2021, 3:00 am. Standard time starts annually on the last Sunday of October.

EET representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +02 - basic short
  • +0200 - basic
  • +02:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0200 - sign character (+) followed by a four digit time providing hours (02) and minutes (00) of the offset. Indicates an offset of two hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Bravo - Military abbreviation for EET
  • B - short form of 'Bravo'
IANA/Olson: Reflects EET time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Cairo
  • Africa/Tripoli
  • Asia/Beirut
  • Asia/Famagusta
  • Asia/Gaza
  • Asia/Hebron
  • Asia/Nicosia
  • EET
  • Egypt
  • Europe/Athens
  • Europe/Bucharest
  • Europe/Chisinau
  • Europe/Helsinki
  • Europe/Kaliningrad
  • Europe/Kiev
  • Europe/Kyiv
  • Europe/Mariehamn
  • Europe/Nicosia
  • Europe/Riga
  • Europe/Sofia
  • Europe/Tallinn
  • Europe/Tiraspol
  • Europe/Uzhgorod
  • Europe/Vilnius
  • Europe/Zaporozhye
  • Libya
Time zones with the GMT +2 offset:
  • CEST - Central European Summer Time
  • EET - Eastern European Time
  • MESZ - Mitteleuropäische Sommerzeit
  • B - Bravo Time Zone
  • CAT - Central Africa Time
  • IST - Israel Standard Time
  • SAST - South Africa Standard Time
  • WAST - West Africa Summer Time

Central European Time

Offset: CET is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe

Countries using this time zone: Algeria, Tunisia

Principal Cities: The largest city in the CET time zone is Algiers in Algeria, with about 1.978 million people. Other major cities in this time zone include Boumerdas, Tunis, Oran, Tebessa.

German: MEZ - Mitteleuropäische Zeit

CET Time Zone Geo Map
CET timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central European Summer Time (CEST).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Central European Time (CET) ended on Sunday, March 28, 2021 at 2:00 am local time and clocks were set one hour forward to Sunday, March 28, 2021, 3:00 am local daylight time instead. Standard time ends annually on the last Sunday of March.

Daylight saving time clock moves back for one hour from 3am to 2amStart: Central European Time (CET) starts on Sunday, October 31, 2021 at 3:00 am local time and clocks are set one hour back to Sunday, October 31, 2021, 2:00 am. Standard time starts annually on the last Sunday of October.

CET representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +01 - basic short
  • +0100 - basic
  • +01:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Alpha - Military abbreviation for CET
  • A - short form of 'Alpha'
IANA/Olson: Reflects CET time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Algiers
  • Africa/Ceuta
  • Africa/Tunis
  • Arctic/Longyearbyen
  • Atlantic/Jan_Mayen
  • CET
  • Europe/Amsterdam
  • Europe/Andorra
  • Europe/Belgrade
  • Europe/Berlin
  • Europe/Bratislava
  • Europe/Brussels
  • Europe/Budapest
  • Europe/Busingen
  • Europe/Copenhagen
  • Europe/Gibraltar
  • Europe/Ljubljana
  • Europe/Luxembourg
  • Europe/Madrid
  • Europe/Malta
  • Europe/Monaco
  • Europe/Oslo
  • Europe/Paris
  • Europe/Podgorica
  • Europe/Prague
  • Europe/Rome
  • Europe/San_Marino
  • Europe/Sarajevo
  • Europe/Skopje
  • Europe/Stockholm
  • Europe/Tirane
  • Europe/Vaduz
  • Europe/Vatican
  • Europe/Vienna
  • Europe/Warsaw
  • Europe/Zagreb
  • Europe/Zurich
  • MET
  • Poland
Time zones with the GMT +1 offset:
  • BST - British Summer Time
  • CET - Central European Time
  • IST - Irish Standard Time
  • WEST - Western European Summer Time
  • A - Alpha Time Zone
  • CET - Central European Time
  • MEZ - Mitteleuropäische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time