Houston to Austin to Delaware to Columbus to IST to ET to SAST Time Converter

Updating current time…
Houston
Texas, USACST
UTC−6
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Austin
Texas, USACST
UTC−6
same time
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Delaware
Ohio, USAEST
UTC−5
1h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Columbus
Ohio, USAEST
UTC−5
1h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
IST
India Standard Time
UTC+5:30
11h 30m ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
ET
Eastern Time
UTC−5
1h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
SAST
South Africa Standard Time
UTC+2
8h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

6:00 am06:00 CST (UTC-6), Nov 14, 2026 = 6:00 am06:00 CST (UTC-6), Nov 14, 2026 = 7:00 am07:00 EST (UTC-5), Nov 14, 2026 = 7:00 am07:00 EST (UTC-5), Nov 14, 2026 = 5:30 pm17:30 IST (UTC+5:30), Nov 14, 2026 = 7:00 am07:00 ET (UTC-5), Nov 14, 2026 = 2:00 pm14:00 SAST (UTC+2), Nov 14, 2026

Houston and Austin have the same local time. Houston is 1 hour behind Delaware. Houston is 1 hour behind Columbus. Houston is 11 hours and 30 minutes behind IST. Houston is 1 hour behind ET. Houston is 8 hours behind SAST.

How the time difference changes

Houston to Austin

Houston and Austin have the same time year-round.

Working hours of 9:00 am to 6:00 pm in Houston correspond to 9:00 am to 6:00 pm in Austin.Working hours of 09:00 to 18:00 in Houston correspond to 09:00 to 18:00 in Austin.

Houston to Delaware

Normally, Houston is 1 hour behind Delaware. Briefly around seasonal clock changes, Houston and Delaware have the same time or Houston is 2 hours behind Delaware.

Typically, working hours of 9:00 am to 6:00 pm in Houston correspond to 10:00 am to 7:00 pm in Delaware.Typically, working hours of 09:00 to 18:00 in Houston correspond to 10:00 to 19:00 in Delaware.

Houston to Columbus

Normally, Houston is 1 hour behind Columbus. Briefly around seasonal clock changes, Houston and Columbus have the same time or Houston is 2 hours behind Columbus.

Typically, working hours of 9:00 am to 6:00 pm in Houston correspond to 10:00 am to 7:00 pm in Columbus.Typically, working hours of 09:00 to 18:00 in Houston correspond to 10:00 to 19:00 in Columbus.

Houston to IST

For most of the year, Houston is 10 hours and 30 minutes behind IST. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, Houston is 11 hours and 30 minutes behind IST.

For most of the year, working hours of 9:00 am to 6:00 pm in Houston correspond to 7:30 pm to 4:30 am (next day) in IST. At other times of the year, working hours of 9:00 am to 6:00 pm in Houston correspond to 8:30 pm to 5:30 am (next day) in IST.For most of the year, working hours of 09:00 to 18:00 in Houston correspond to 19:30 to 04:30 (next day) in IST. At other times of the year, working hours of 09:00 to 18:00 in Houston correspond to 20:30 to 05:30 (next day) in IST.

Houston to ET

Normally, Houston is 1 hour behind ET. Briefly around seasonal clock changes, Houston and ET have the same time or Houston is 2 hours behind ET.

Typically, working hours of 9:00 am to 6:00 pm in Houston correspond to 10:00 am to 7:00 pm in ET.Typically, working hours of 09:00 to 18:00 in Houston correspond to 10:00 to 19:00 in ET.

Houston to SAST

For most of the year, Houston is 7 hours behind SAST. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, Houston is 8 hours behind SAST.

For most of the year, working hours of 9:00 am to 6:00 pm in Houston correspond to 4:00 pm to 1:00 am (next day) in SAST. At other times of the year, working hours of 9:00 am to 6:00 pm in Houston correspond to 5:00 pm to 2:00 am (next day) in SAST.For most of the year, working hours of 09:00 to 18:00 in Houston correspond to 16:00 to 01:00 (next day) in SAST. At other times of the year, working hours of 09:00 to 18:00 in Houston correspond to 17:00 to 02:00 (next day) in SAST.

Compare Houston time with Austin, Delaware, Columbus, IST, ET, and SAST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

CST (Central Standard Time) and CST (Central Standard Time) have the same local time. CST (Central Standard Time) is 1 hour behind EST (Eastern Standard Time). CST (Central Standard Time) is 1 hour behind EST (Eastern Standard Time). CST (Central Standard Time) is 11 hours and 30 minutes behind India Standard Time. CST (Central Standard Time) is 1 hour behind Eastern Time. CST (Central Standard Time) is 8 hours behind South Africa Standard Time.
6:00 am06:00 in Houston, TX, USA is 6:00 am06:00 in Austin, TX, USA and is 7:00 am07:00 in Delaware, OH, USA and is 7:00 am07:00 in Columbus, OH, USA and is 5:30 pm17:30 in IST and is 7:00 am07:00 in ET and is 2:00 pm14:00 in SAST

Houston to Austin call time
Best time for a conference call or a meeting is between 9am-6pm09:00-18:00 in Houston which corresponds to 9am-6pm09:00-18:00 in Austin.
Houston to Delaware call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in Houston which corresponds to 10am-6pm10:00-18:00 in Delaware.
Houston to Columbus call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in Houston which corresponds to 10am-6pm10:00-18:00 in Columbus.
Houston to IST call time
Best time for a conference call or a meeting is between 7:30am-8:30am07:30-08:30 in Houston which corresponds to 7pm-8pm19:00-20:00 in IST. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
Houston to ET call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in Houston which corresponds to 10am-6pm10:00-18:00 in ET.
Houston to SAST call time
Best time for a conference call or a meeting is between 9am-10am09:00-10:00 in Houston which corresponds to 5pm-6pm17:00-18:00 in SAST.

6:00 am06:00 CST (Central Standard Time) (Houston, TX, USA). Offset UTC -6:00 hours
6:00 am06:00 CST (Central Standard Time) (Austin, TX, USA). Offset UTC -6:00 hours
7:00 am07:00 EST (Eastern Standard Time) (Delaware, OH, USA). Offset UTC -5:00 hours
7:00 am07:00 EST (Eastern Standard Time) (Columbus, OH, USA). Offset UTC -5:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
7:00 am07:00 Eastern Time (ET). Offset UTC -5:00 hours
2:00 pm14:00 South Africa Standard Time (SAST). Offset UTC +2:00 hours

6:00 am06:00 Houston, TX, USA / 6:00 am06:00 Austin, TX, USA / 7:00 am07:00 Delaware, OH, USA / 7:00 am07:00 Columbus, OH, USA / 5:30 pm17:30 IST / 7:00 am07:00 ET / 2:00 pm14:00 SAST

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
Houston, TX, USAAustin, TX, USADelaware, OH, USAColumbus, OH, USAISTETSAST
12:00am1:00am1:00am11:30am1:00am8:00am
1:00am2:00am2:00am12:30pm2:00am9:00am
2:00am3:00am3:00am1:30pm3:00am10:00am
3:00am4:00am4:00am2:30pm4:00am11:00am
4:00am5:00am5:00am3:30pm5:00am12:00pm
5:00am6:00am6:00am4:30pm6:00am1:00pm
6:00am7:00am7:00am5:30pm7:00am2:00pm
7:00am8:00am8:00am6:30pm8:00am3:00pm
8:00am9:00am9:00am7:30pm9:00am4:00pm
9:00am10:00am10:00am8:30pm10:00am5:00pm
10:00am11:00am11:00am9:30pm11:00am6:00pm
11:00am12:00pm12:00pm10:30pm12:00pm7:00pm
12:00pm1:00pm1:00pm11:30pm1:00pm8:00pm
1:00pm2:00pm2:00pm12:30am next day2:00pm9:00pm
2:00pm3:00pm3:00pm1:30am next day3:00pm10:00pm
3:00pm4:00pm4:00pm2:30am next day4:00pm11:00pm
4:00pm5:00pm5:00pm3:30am next day5:00pm12:00am next day
5:00pm6:00pm6:00pm4:30am next day6:00pm1:00am next day
6:00pm7:00pm7:00pm5:30am next day7:00pm2:00am next day
7:00pm8:00pm8:00pm6:30am next day8:00pm3:00am next day
8:00pm9:00pm9:00pm7:30am next day9:00pm4:00am next day
9:00pm10:00pm10:00pm8:30am next day10:00pm5:00am next day
10:00pm11:00pm11:00pm9:30am next day11:00pm6:00am next day
11:00pm12:00am next day12:00am next day10:30am next day12:00am next day7:00am next day
00:0001:0001:0011:3001:0008:00
01:0002:0002:0012:3002:0009:00
02:0003:0003:0013:3003:0010:00
03:0004:0004:0014:3004:0011:00
04:0005:0005:0015:3005:0012:00
05:0006:0006:0016:3006:0013:00
06:0007:0007:0017:3007:0014:00
07:0008:0008:0018:3008:0015:00
08:0009:0009:0019:3009:0016:00
09:0010:0010:0020:3010:0017:00
10:0011:0011:0021:3011:0018:00
11:0012:0012:0022:3012:0019:00
12:0013:0013:0023:3013:0020:00
13:0014:0014:0000:30 next day14:0021:00
14:0015:0015:0001:30 next day15:0022:00
15:0016:0016:0002:30 next day16:0023:00
16:0017:0017:0003:30 next day17:0000:00 next day
17:0018:0018:0004:30 next day18:0001:00 next day
18:0019:0019:0005:30 next day19:0002:00 next day
19:0020:0020:0006:30 next day20:0003:00 next day
20:0021:0021:0007:30 next day21:0004:00 next day
21:0022:0022:0008:30 next day22:0005:00 next day
22:0023:0023:0009:30 next day23:0006:00 next day
23:0000:00 next day00:00 next day10:30 next day00:00 next day07:00 next day

Houston Time Zone and Facts

Time Zone

Abbreviation / Offset
CST – Central Standard Time, UTC-6 (now)
CDT – Central Daylight Time, UTC-5 (daylight saving time)
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (CDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
123456789101112Sunday, November 7, 2027 at 2:00 amSunday, November 7, 2027 at 02:00: clocks go back 1 hour to 1:00 am01:00 (CST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Clock Changes
USA daylight saving time · Clock changes worldwide

Houston Facts

Country
USA
State
Texas
Alternative Names
Chiouston, HOU, Hiu-su-tun, Hiustonas, Hiû-sṳ̂-tûn, Hjuston, Hjustona, Hjūstona, Houston, Houston City, Hustonia, Hyuston, Kh'juston, Khjustn, Khjustan, Khjuston, hi'ustana, hiustʼoni, hiws tan, hiyustan, hou si dun, husatana, hyuseuteon, hyustan, hyustana, hyusuton, hywstn, hywstwn, xiu si dun, ywstwn, Χιούστον, Хьюстон, Хюстан, Хюстон, Хюстън, Хјустон, Հյուստոն, היוסטן, יוסטון, هيوستن, هیوستون, ھیووستن, ہywsٹn, ہیوسٹن, ह्युस्टन, হিউস্টন, ਹੂਸਟਨ, હ્યુસ્ટન, ஹியூஸ்டன், హ్యూస్టన్, ഹ്യൂസ്റ്റൺ, ฮิวสตัน, ဟူစတန်မြို့, ჰიუსტონი, ሂውስተን, ヒューストン, 休斯敦, 休斯頓, 侯斯頓, 휴스턴
Population
2,314,157
Currency
Dollar (USD)
Geographic Coordinates
29° 45' N Latitude / 95° 21' W Longitude
International Dialing Code
+1
More About Houston
Houston local time and city facts

Austin Time Zone and Facts

Time Zone

Abbreviation / Offset
CST – Central Standard Time, UTC-6 (now)
CDT – Central Daylight Time, UTC-5 (daylight saving time)
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (CDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
123456789101112Sunday, November 7, 2027 at 2:00 amSunday, November 7, 2027 at 02:00: clocks go back 1 hour to 1:00 am01:00 (CST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Clock Changes
USA daylight saving time · Clock changes worldwide

Austin Facts

Country
USA
State
Texas
Alternative Names
AUS, Austin, Austino, Austinopolis, Aŭstino, Montopolis, Oscin, Ostin, Ostina, Ostinas, Ostins, Waterloo, ao si ting, asatina, astin, astina, astyn tgzas, awstn, ke shi dian, oseutin, ostina, ostʼini, osutin, xxstin, Ώστιν, Остин, Остін, Осцін, Օստին, אוסטין, אסטין, آستین، تگزاس, آسٹن, آسٹن، ٹیکساس, أوستن, अस्टिन, अस्तिन, आस्टिन्, ऑस्टिन, অস্টিন, ਆਸਟਿਨ, ஆஸ்டின், ഓസ്റ്റിൻ, ออสติน, ოსტინი, ኦስቲን፣ ቴክሳስ, ᎠᏍᏘᏂ, オースティン, 奧斯汀, 柯士甸, 오스틴
Population
974,447
Currency
Dollar (USD)
Geographic Coordinates
30° 16' N Latitude / 97° 44' W Longitude
International Dialing Code
+1
More About Austin
Austin local time and city facts

Delaware Time Zone and Facts

Time Zone

Abbreviation / Offset
EST – Eastern Standard Time, UTC-5 (now)
EDT – Eastern Daylight Time, UTC-4 (daylight saving time)
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (EDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
123456789101112Sunday, November 7, 2027 at 2:00 amSunday, November 7, 2027 at 02:00: clocks go back 1 hour to 1:00 am01:00 (EST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Clock Changes
USA daylight saving time · Clock changes worldwide

Delaware Facts

Country
USA
State
Ohio
Alternative Names
Delavarskij, Delaver, Delaware, Millville, derau~ea, dlawar awhayw, dylawyr, Делаварский, Делавер, دلاوار، اوهایو, ديلاوير, デラウェア
Population
37,995
Currency
Dollar (USD)
Geographic Coordinates
40° 17' N Latitude / 83° 04' W Longitude
International Dialing Code
+1
More About Delaware
Delaware local time and city facts

Columbus Time Zone and Facts

Time Zone

Abbreviation / Offset
EST – Eastern Standard Time, UTC-5 (now)
EDT – Eastern Daylight Time, UTC-4 (daylight saving time)
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (EDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
123456789101112Sunday, November 7, 2027 at 2:00 amSunday, November 7, 2027 at 02:00: clocks go back 1 hour to 1:00 am01:00 (EST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Clock Changes
USA daylight saving time · Clock changes worldwide

Columbus Facts

Country
USA
State
Ohio
Alternative Names
CMH, Columbopolis, Columbus, Columbus i Ohio, Franklin, Franklinton, Kalumbus, Kolambus, Kolompous, Kolumbas, Kolumbs, Kolumbu, Kolumbus, Kolumbusa, Kulumbus, ge lun bu, kalabasa, kalambasa, kholambas, klmbws awhayw, kolambas, kolambasa, kolampas, kolleombeoseu, koronbasu, kwlwmbws, qwlwmbws, Κολόμπους, Калумбус, Коламбус, Колумбус, Кълъмбъс, Կոլումբուս, קאלומבוס, קולומבוס, كولومبوس, کلمبوس، اوهایو, کولمبس، اوہائیو, कोलंबस, कोलम्बस, कोलम्बस्, কলম্বাস, ਕਲੰਬਸ, கொலம்பஸ், โคลัมบัส, კოლუმბუსი, コロンバス, 哥伦布, 哥倫布, 콜럼버스
Population
913,175
Currency
Dollar (USD)
Geographic Coordinates
39° 57' N Latitude / 82° 59' W Longitude
International Dialing Code
+1
More About Columbus
Columbus local time and city facts

India Standard Time

Offset: IST is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT).

Countries using this time zone: India

Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bengaluru, Hyderabad, Ahmedabad.

Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

Current time in India: India time now

Map of the areas on India Standard Time (IST)
IST all year

Open the world time zone map© OpenStreetMap

IST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0530 - basic
  • +05:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Calcutta
  • Asia/Kolkata
IST Abbreviation: Several time zones share IST abbreviation and it could refer to these time zones
  • India Standard Time - UTC +5:30
  • Irish Standard Time - UTC +1
  • Israel Standard Time - UTC +2

Eastern Time

Eastern Time (ET) is a general term used to describe the areas that observe either the Eastern Standard Time (EST) or Eastern Daylight Time (EDT) in the United States and Canada. ET is not static but switches between EDT and EST.

ET is also used somewhat as a de facto official time for all of the United States because it encompasses 17 U.S. states in the eastern part of the contiguous United States including the capital city Washington D.C., the most populous city New York and half of the country’s population.

In the United States nationally televised programs, evening newscasts, talent and awards shows, and any other nationally televised event that airs live on American television during prime time and on the weekends are broadcast live in the Eastern Time Zone. Major professional sports leagues MLB, NBA, NFL and NHL also provide their game times in Eastern Time, even if teams are from outside of Eastern Time.

Countries using this time zone: Bahamas, Canada, Cayman Islands, Haiti, Jamaica, Mexico, Panama, Turks and Caicos Islands, United States

Principal Cities: The largest city in the ET time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

Map of the areas on Eastern Time (ET)
ET all year ET part of the year

Today all shaded areas are on ET.

Open the world time zone map© OpenStreetMap

ET representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for ET
  • R - short form of 'Romeo'
ET Abbreviation: Several time zones share ET abbreviation and it could refer to these time zones
  • Eastern Time - UTC -5
  • Tiempo del Este - UTC -5
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone

South Africa Standard Time

Offset: SAST is 2 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Eswatini, Lesotho, South Africa

Principal Cities: The largest city in the SAST time zone is Johannesburg in South Africa, with about 9.418 million people. Other major cities in this time zone include Cape Town, Durban, Pretoria, Gqeberha.

Daylight Saving: Clocks in South Africa Standard Time (SAST) do not change for daylight saving time, so SAST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

Map of the areas on South Africa Standard Time (SAST)
SAST all year

Open the world time zone map© OpenStreetMap

SAST 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 SAST
  • B - short form of 'Bravo'
IANA/Olson: Reflects SAST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Johannesburg
  • Africa/Maseru
  • Africa/Mbabane
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