Pennsylvania, USA
EST
South Korea
KST
JST
Japan Standard Time
GMT +9
Illinois, USA
CST

Time Difference

EST (Eastern Standard Time) is 14 hours behind KST (Korea Standard Time) and 14 hours behind Japan Standard Time and 1 hour ahead of CST (Central Standard Time)
10:00 pm22:00 in Pittsburgh, PA, USA is 12:00 pm12:00 in Seoul, South Korea and is 12:00 pm12:00 in JST and is 9:00 pm21:00 in Chicago, IL, USA

Pittsburgh to Seoul call time
Best time for a conference call or a meeting is between 6am-8am in Pittsburgh which corresponds to 8pm-10pm in Seoul
Pittsburgh to JST call time
Best time for a conference call or a meeting is between 6am-8am in Pittsburgh which corresponds to 8pm-10pm in JST
Pittsburgh to Chicago call time
Best time for a conference call or a meeting is between 9am-6pm in Pittsburgh which corresponds to 8am-5pm in Chicago

10:00 pm22:00 EST (Eastern Standard Time) (Pittsburgh, PA, USA). Offset UTC -5:00 hours
12:00 pm12:00 KST (Korea Standard Time) (Seoul, South Korea). Offset UTC +9:00 hours
12:00 pm12:00 Japan Standard Time (JST). Offset UTC +9:00 hours
9:00 pm21:00 CST (Central Standard Time) (Chicago, IL, USA). Offset UTC -6:00 hours

10:00 pm22:00 Pittsburgh, PA, USA / 12:00 pm12:00 Seoul, South Korea / 12:00 pm12:00 JST / 9:00 pm21:00 Chicago, IL, USA

Pittsburgh, PA, USA Seoul, South Korea JST Chicago, IL, USA
12am (midnight) 2pm 2pm 11pm
1am 3pm 3pm 12am (midnight)
2am 4pm 4pm 1am
3am 5pm 5pm 2am
4am 6pm 6pm 3am
5am 7pm 7pm 4am
6am 8pm 8pm 5am
7am 9pm 9pm 6am
8am 10pm 10pm 7am
9am 11pm 11pm 8am
10am 12am (midnight) 12am (midnight) 9am
11am 1am 1am 10am
12pm (noon) 2am 2am 11am
1pm 3am 3am 12pm (noon)
2pm 4am 4am 1pm
3pm 5am 5am 2pm
4pm 6am 6am 3pm
5pm 7am 7am 4pm
6pm 8am 8am 5pm
7pm 9am 9am 6pm
8pm 10am 10am 7pm
9pm 11am 11am 8pm
10pm 12pm (noon) 12pm (noon) 9pm
11pm 1pm 1pm 10pm
0:00 14:00 14:00 23:00
1:00 15:00 15:00 0:00
2:00 16:00 16:00 1:00
3:00 17:00 17:00 2:00
4:00 18:00 18:00 3:00
5:00 19:00 19:00 4:00
6:00 20:00 20:00 5:00
7:00 21:00 21:00 6:00
8:00 22:00 22:00 7:00
9:00 23:00 23:00 8:00
10:00 0:00 0:00 9:00
11:00 1:00 1:00 10:00
12:00 2:00 2:00 11:00
13:00 3:00 3:00 12:00
14:00 4:00 4:00 13:00
15:00 5:00 5:00 14:00
16:00 6:00 6:00 15:00
17:00 7:00 7:00 16:00
18:00 8:00 8:00 17:00
19:00 9:00 9:00 18:00
20:00 10:00 10:00 19:00
21:00 11:00 11:00 20:00
22:00 12:00 12:00 21:00
23:00 13:00 13:00 22:00

Pittsburgh Information

Time Zone

Abbreviation / Name
EST - Eastern Standard Time
EDT - Eastern Daylight Time
UTC / GMT Offset
-5:00 hours during Eastern Standard Time, currently in use.
-4:00 hours during Eastern Daylight Time.
Daylight Saving Time Change
+1:00 hour - DST is NOT in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hour from 2am to 3am Sunday, March 13, 2022 at 2:00 am local time. DST starts annually the on second Sunday of March. Clocks are turned forward 1 hour to Sunday, March 13, 2022, 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves back for one hour from 2am to 1am Sunday, November 6, 2022 at 2:00 am local time. DST ends annually the on first Sunday of November. Clocks are turned backward 1 hour to Sunday, November 6, 2022, 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.

Pittsburgh Facts

Country
USA
State
Pennsylvania
Alternative Names
Allegheny, Fort Dunmore, Fort Duquesne, Fort Pitt, Fort Trent, PIT, Pitsbrg, Pitsburg, Pitsburga, Pitsburgas, Pitsburgo, Pitsmpernk, Pitts-Bourg, Pittsbarig, Pittsburg, Pittsburgh, Pittsburgum, Pittsburq, The Manor of Pittsburgh, bytsbrgh, phitts beirk, pi ci bao, pi zi bao, picheubeogeu, pitasabaraga, pitsabarga, pitspark, pits‌barg, pittsubagu, pytsbrg pnsylwanya, pytsbwrg, Πίτσμπεργκ, Питсбург, Питсбърг, Питтсбург, Пітсбург, Піттсбург, פיטסבורג, بيتسبرغ, پٹس برگ, پٹسبرگ, پیتسبرگ، پنسیلوانیا, पिट्सबर्ग, ਪਿਟਸਬਰਗ, பிட்ஸ்பர்க், పిట్స్‌బర్గ్, ಪಿಟ್ಸ್‌ಬರ್ಗ್, พิตต์สเบิร์ก, ピッツバーグ, 匹兹堡, 匹茲堡, 피츠버그
Population
304,391
Currency
Dollar (USD)
Geographic Coordinates
40° 26' N Latitude / 79° 59' W Longitude
International Dialing Code
+1

Seoul Information

Time Zone

Abbreviation / Name
KST - Korea Standard Time
UTC / GMT Offset
+9:00 hours during Korea Standard Time, currently in use.

Seoul Facts

Country
South Korea
Alternative Names
Hanyang, SEL, Seoel, Seol, Seoul, Seoul-si, Seuel, Seul, Seula, Seulas, Seulo, Seulum, Seúl, Seül, Siul, Soeul, Sol, Soul, Sye-ul, Syou-ouen, Szoeul, Szöul, Séoul, Sêûl, Söul, Sŏul, Wang-ching, Wo-jo, Wō-jō, ciyol, han-yang, saul, seoul, seoulsi, seoulteugbyeolsi, seuli, shou er, shou er te bie shi, si'ula, siyola, sol, sola, souru, souru te bie shi, sywl, Σεούλ, Сеул, Соул, Сөүл, Սեուլ, סאול, סיאול, סעאל, سئول, سيول, سیول, سێئول, سېئول, सियोल, सोल, সিউল, சியோல், ಸೌಲ್, സോൾ, โซล, སེ་ཨུལ།, ဆိုးလ်မြို့, სეული, ሶል, សេអ៊ូល, ソウル, ソウル特別市, 首尔, 首尔特别市, 서울, 서울시, 서울특별시, 한양
Population
10,349,312
Currency
Won (KRW)
Geographic Coordinates
37° 33' N Latitude / 126° 58' E Longitude
International Dialing Code
+82

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 Time Zone Geo Map
JST timezone map

JST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +09 - basic short
  • +0900 - basic
  • +09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates nine hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • India - Military abbreviation for JST
  • I - short form of 'India'
IANA/Olson: Reflects JST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Tokyo
  • Japan
Time zones with the GMT +9 offset:
  • AWDT - Australian Western Daylight Time
  • CHOST - Choibalsan Summer Time
  • I - India Time Zone
  • IRKST - Irkutsk Summer Time
  • JST - Japan Standard Time
  • KST - Korea Standard Time
  • PWT - Palau Time
  • TLT - East Timor Time
  • ULAST - Ulaanbaatar Summer Time
  • WIT - Eastern Indonesian Time
  • YAKT - Yakutsk Time

Chicago Information

Time Zone

Abbreviation / Name
CST - Central Standard Time
CDT - Central Daylight Time
UTC / GMT Offset
-6:00 hours during Central Standard Time, currently in use.
-5:00 hours during Central Daylight Time.
Daylight Saving Time Change
+1:00 hour - DST is NOT in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hour from 2am to 3am Sunday, March 13, 2022 at 2:00 am local time. DST starts annually the on second Sunday of March. Clocks are turned forward 1 hour to Sunday, March 13, 2022, 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves back for one hour from 2am to 1am Sunday, November 6, 2022 at 2:00 am local time. DST ends annually the on first Sunday of November. Clocks are turned backward 1 hour to Sunday, November 6, 2022, 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.

Chicago Facts

Country
USA
State
Illinois
Alternative Names
CHI, Cekaga, Chi-ka-ko, Chi-kâ-kô, Chicago, Chicagu, Chikago, Chykaga, Cikaga, Cikago, Cikaqo, E-Chicago, Kikako, Shikago, Sicagum, Sikago, The Windy City, Tsikago, Windy City, chikhako, cikago, cikako, shikago, shkagw, shykaghw, shykagw, shykajw, shyqgw, sikago, sikkagea, syqgw, zhi jia ge, Çikago, Çikaqo, Ĉikago, Čikaga, Čikago, Čikāga, Čėkaga, Şikago, Σικάγο, Чикаго, Чикаґо, Чыкага, Չիկագո, שיקאגא, שיקגו, شيكاجو, شيكاغو, شکاگو, شیکاگو, شیکاگۆ, ܫܝܩܓܘ, शिकागो, শিকাগো, ਸ਼ਿਕਾਗੋ, சிகாகோ, చికాగో, ಶಿಕಾಗೊ, ഷിക്കാഗോ, ชิคาโก, ရှီကာဂိုမြို့, ჩიკაგო, ሺካጎ, ᓰᖄᑯ, Ṣìkágò, シカゴ, 芝加哥, 시카고, 𐍃𐌾𐌹𐌺𐌰𐌲𐍉
Population
2,720,546
Currency
Dollar (USD)
Geographic Coordinates
41° 51' N Latitude / 87° 39' W Longitude
International Dialing Code
+1