Boulder to New York City to Salvador to London to Tokyo to Sydney Time Converter

Boulder
Colorado, USAMDT
UTC−6
Sat, May 29
12am
3am
6am
9am
12pm
3pm
6pm
9pm
New York City
New York, USAEDT
UTC−4
Sat, May 29
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Salvador
BrazilBRT
UTC−3
Sat, May 29
12am
3am
6am
9am
12pm
3pm
6pm
9pm
London
United KingdomBST
UTC+1
Sat, May 29
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Tokyo
JapanJST
UTC+9
Sun, May 30 (next day)
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Sydney
AustraliaAEST
UTC+10
Sun, May 30 (next day)
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

9:30 am09:30 MDT (UTC-6), May 29, 2021 = 11:30 am11:30 EDT (UTC-4), May 29, 2021 = 12:30 pm12:30 BRT (UTC-3), May 29, 2021 = 4:30 pm16:30 BST (UTC+1), May 29, 2021 = 12:30 am00:30 JST (UTC+9), May 30, 2021 = 1:30 am01:30 AEST (UTC+10), May 30, 2021

Boulder is 2 hours behind New York City. Boulder is 3 hours behind Salvador. Boulder is 7 hours behind London. Boulder is 15 hours behind Tokyo. Boulder is 16 hours behind Sydney.

How the time difference changes

Boulder to New York City

Normally, Boulder is 2 hours behind New York City. Briefly around seasonal clock changes, Boulder is 1 hour behind New York City or Boulder is 3 hours behind New York City.

Typically, working hours of 9:00 am to 5:00 pm in Boulder correspond to 11:00 am to 7:00 pm in New York City.Typically, working hours of 09:00 to 17:00 in Boulder correspond to 11:00 to 19:00 in New York City.

Boulder to Salvador

For most of the year, Boulder is 3 hours behind Salvador. From Nov 1, 2026 to Mar 14, 2027, Boulder is 4 hours behind Salvador.

For most of the year, working hours of 9:00 am to 5:00 pm in Boulder correspond to 12:00 pm to 8:00 pm in Salvador. At other times of the year, working hours of 9:00 am to 5:00 pm in Boulder correspond to 1:00 pm to 9:00 pm in Salvador.For most of the year, working hours of 09:00 to 17:00 in Boulder correspond to 12:00 to 20:00 in Salvador. At other times of the year, working hours of 09:00 to 17:00 in Boulder correspond to 13:00 to 21:00 in Salvador.

Boulder to London

For most of the year, Boulder is 7 hours behind London. From Oct 25 to Nov 1, 2026, and from Mar 14 to Mar 28, 2027, Boulder is 6 hours behind London.

For most of the year, working hours of 9:00 am to 5:00 pm in Boulder correspond to 4:00 pm to 12:00 am (next day) in London. At other times of the year, working hours of 9:00 am to 5:00 pm in Boulder correspond to 3:00 pm to 11:00 pm in London.For most of the year, working hours of 09:00 to 17:00 in Boulder correspond to 16:00 to 00:00 (next day) in London. At other times of the year, working hours of 09:00 to 17:00 in Boulder correspond to 15:00 to 23:00 in London.

Boulder to Tokyo

For most of the year, Boulder is 15 hours behind Tokyo. From Nov 1, 2026 to Mar 14, 2027, Boulder is 16 hours behind Tokyo.

For most of the year, working hours of 9:00 am to 5:00 pm in Boulder correspond to 12:00 am (next day) to 8:00 am (next day) in Tokyo. At other times of the year, working hours of 9:00 am to 5:00 pm in Boulder correspond to 1:00 am (next day) to 9:00 am (next day) in Tokyo.For most of the year, working hours of 09:00 to 17:00 in Boulder correspond to 00:00 (next day) to 08:00 (next day) in Tokyo. At other times of the year, working hours of 09:00 to 17:00 in Boulder correspond to 01:00 (next day) to 09:00 (next day) in Tokyo.

Boulder to Sydney

Depending on seasonal clock changes, Boulder is 16 hours behind Sydney, Boulder is 17 hours behind Sydney, or Boulder is 18 hours behind Sydney.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in Boulder correspond to 1:00 am (next day) to 9:00 am (next day) in Sydney, working hours of 9:00 am to 5:00 pm in Boulder correspond to 2:00 am (next day) to 10:00 am (next day) in Sydney, or working hours of 9:00 am to 5:00 pm in Boulder correspond to 3:00 am (next day) to 11:00 am (next day) in Sydney.Depending on seasonal clock changes, working hours of 09:00 to 17:00 in Boulder correspond to 01:00 (next day) to 09:00 (next day) in Sydney, working hours of 09:00 to 17:00 in Boulder correspond to 02:00 (next day) to 10:00 (next day) in Sydney, or working hours of 09:00 to 17:00 in Boulder correspond to 03:00 (next day) to 11:00 (next day) in Sydney.

Compare Boulder time with New York City, Salvador, London, Tokyo, and Sydney time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

MDT (Mountain Daylight Time) is 2 hours behind EDT (Eastern Daylight Time). MDT (Mountain Daylight Time) is 3 hours behind BRT (Brasilia Time). MDT (Mountain Daylight Time) is 7 hours behind BST (British Summer Time). MDT (Mountain Daylight Time) is 15 hours behind JST (Japan Standard Time). MDT (Mountain Daylight Time) is 16 hours behind AEST (Australian Eastern Standard Time).
9:30 am09:30 in Boulder, CO, USA is 11:30 am11:30 in New York City, NY, USA and is 12:30 pm12:30 in Salvador, Brazil and is 4:30 pm16:30 in London, United Kingdom and is 12:30 am00:30 in Tokyo, Japan and is 1:30 am01:30 in Sydney, Australia

Boulder to New York City call time
Best time for a conference call or a meeting is between 9am-3pm09:00-15:00 in Boulder which corresponds to 11am-5pm11:00-17:00 in New York City
Boulder to Salvador call time
Best time for a conference call or a meeting is between 9am-2pm09:00-14:00 in Boulder which corresponds to 12pm-5pm12:00-17:00 in Salvador
Boulder to London call time
Best time for a conference call or a meeting is between 9am-10am09:00-10:00 in Boulder which corresponds to 4pm-5pm16:00-17:00 in London
Boulder to Tokyo call time
Best time for a conference call or a meeting is between 5pm-6pm17:00-18:00 in Boulder which corresponds to 8am-9am08:00-09:00 in Tokyo (next day). Their 9am–5pm09:00–17:00 working hours do not overlap; this is a suggested compromise.
Boulder to Sydney call time
Best time for a conference call or a meeting is between 4:30pm-5:30pm16:30-17:30 in Boulder which corresponds to 8:30am-9:30am08:30-09:30 in Sydney (next day). Their 9am–5pm09:00–17:00 working hours do not overlap; this is a suggested compromise.

9:30 am09:30 MDT (Mountain Daylight Time) (Boulder, CO, USA). Offset UTC -6:00 hours
11:30 am11:30 EDT (Eastern Daylight Time) (New York City, NY, USA). Offset UTC -4:00 hours
12:30 pm12:30 BRT (Brasilia Time) (Salvador, Brazil). Offset UTC -3:00 hours
4:30 pm16:30 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
12:30 am00:30 JST (Japan Standard Time) (Tokyo, Japan). Offset UTC +9:00 hours
1:30 am01:30 AEST (Australian Eastern Standard Time) (Sydney, Australia). Offset UTC +10:00 hours

9:30 am09:30 Boulder, CO, USA / 11:30 am11:30 New York City, NY, USA / 12:30 pm12:30 Salvador, Brazil / 4:30 pm16:30 London, United Kingdom / 12:30 am00:30 Tokyo, Japan / 1:30 am01:30 Sydney, Australia

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
Boulder, CO, USANew York City, NY, USASalvador, BrazilLondon, United KingdomTokyo, JapanSydney, Australia
2:00am3:00am7:00am3:00pm4:00pm
3:00am4:00am8:00am4:00pm5:00pm
4:00am5:00am9:00am5:00pm6:00pm
5:00am6:00am10:00am6:00pm7:00pm
6:00am7:00am11:00am7:00pm8:00pm
7:00am8:00am12:00pm8:00pm9:00pm
8:00am9:00am1:00pm9:00pm10:00pm
9:00am10:00am2:00pm10:00pm11:00pm
10:00am11:00am3:00pm11:00pm12:00am next day
11:00am12:00pm4:00pm12:00am next day1:00am next day
12:00pm1:00pm5:00pm1:00am next day2:00am next day
1:00pm2:00pm6:00pm2:00am next day3:00am next day
2:00pm3:00pm7:00pm3:00am next day4:00am next day
3:00pm4:00pm8:00pm4:00am next day5:00am next day
4:00pm5:00pm9:00pm5:00am next day6:00am next day
5:00pm6:00pm10:00pm6:00am next day7:00am next day
6:00pm7:00pm11:00pm7:00am next day8:00am next day
7:00pm8:00pm12:00am next day8:00am next day9:00am next day
8:00pm9:00pm1:00am next day9:00am next day10:00am next day
9:00pm10:00pm2:00am next day10:00am next day11:00am next day
10:00pm11:00pm3:00am next day11:00am next day12:00pm next day
11:00pm12:00am next day4:00am next day12:00pm next day1:00pm next day
12:00am next day1:00am next day5:00am next day1:00pm next day2:00pm next day
1:00am next day2:00am next day6:00am next day2:00pm next day3:00pm next day
02:0003:0007:0015:0016:00
03:0004:0008:0016:0017:00
04:0005:0009:0017:0018:00
05:0006:0010:0018:0019:00
06:0007:0011:0019:0020:00
07:0008:0012:0020:0021:00
08:0009:0013:0021:0022:00
09:0010:0014:0022:0023:00
10:0011:0015:0023:0000:00 next day
11:0012:0016:0000:00 next day01:00 next day
12:0013:0017:0001:00 next day02:00 next day
13:0014:0018:0002:00 next day03:00 next day
14:0015:0019:0003:00 next day04:00 next day
15:0016:0020:0004:00 next day05:00 next day
16:0017:0021:0005:00 next day06:00 next day
17:0018:0022:0006:00 next day07:00 next day
18:0019:0023:0007:00 next day08:00 next day
19:0020:0000:00 next day08:00 next day09:00 next day
20:0021:0001:00 next day09:00 next day10:00 next day
21:0022:0002:00 next day10:00 next day11:00 next day
22:0023:0003:00 next day11:00 next day12:00 next day
23:0000:00 next day04:00 next day12:00 next day13:00 next day
00:00 next day01:00 next day05:00 next day13:00 next day14:00 next day
01:00 next day02:00 next day06:00 next day14:00 next day15:00 next day

Boulder Time Zone and Facts

Time Zone

Abbreviation / Offset
MDT – Mountain Daylight Time, UTC-6 (now, daylight saving time)
MST – Mountain Standard Time, UTC-7 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, November 1, 2026 at 2:00 amSunday, November 1, 2026 at 02:00: clocks go back 1 hour to 1:00 am01:00 (MST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter 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 (MDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Clock Changes
USA daylight saving time · Clock changes worldwide

Boulder Facts

Country
USA
State
Colorado
Alternative Names
Bolder, Boulder, Bouldur, WBU, ba'uldara, bo de, boldara, bolde xr, boldeo, boruda, bwldr, bwldr klradw, Болдер, Боулдер, Боулдър, בולדר, بولدر, بولدر، کلرادو, بولڈر، کولوراڈو, बाउल्डर, बोल्डर, โบลเดอร์, ボルダー, 波德, 볼더
Population
106,803
Currency
Dollar (USD)
Geographic Coordinates
40° 00' N Latitude / 105° 16' W Longitude
International Dialing Code
+1
More About Boulder
Boulder local time and city facts

New York City Time Zone and Facts

Time Zone

Abbreviation / Offset
EDT – Eastern Daylight Time, UTC-4 (now, daylight saving time)
EST – Eastern Standard Time, UTC-5 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, November 1, 2026 at 2:00 amSunday, November 1, 2026 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.
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.
Clock Changes
USA daylight saving time · Clock changes worldwide

New York City Facts

Country
USA
State
New York
Alternative Names
Aebura, Bandar Raya New York, Big Apple, Cathair Nua-Eabhrac, City of New York, Eabhraig Nuadh, Efrog Newydd, Evrek Nowydh, Ga-no-no, Kanon:no, Kanono, Kanón:no, Kota New York, Lungsod ng New York, N'ju-Jork, NY, NYC, Nea Yorke, Nei Yarrick Schtadt, Neu Amsterdam, Neu Jorck, New Amsterdam, New Orange, New Yorc, New York, New York City, New York Stad, New York borg, New York kenti, New York-borg, New Yorke, New Yorku, Niujorkas, Nju Jork, Njujork, Nouvelle Yorck, Nouvieau York, Nov-Jorko, Nova Amsterda, Nova Iorque, Nova York, Nova-York, Novjorko, Novum Eboracum, Nowy Jork, Nua-Eabhrac, Nueva York, Nujorka, Nyja Jorvik, Nyu York Shehiri, Nòva York, Nýja Jórvík, Thanh pho New York, The Big Apple, Thành phố New York, York Berri, manhattan, n'yuyorka, ni'u iyarka siti, niu yue, niu yue shi, niyuyark nakaram, nkhr niwyxrk, nyuyog, nyuyog si, nyuyoku, nyw ywrq, nywywrk, Ņujorka, Νέα Υόρκη, Њу Јорк, Њујорк, Нью-Ёрк, Нью-Йорк, Ню Йорк, ניו יארק, ניו יורק, ניו־יאָרק, نيويورك, نیویارک شہر, نیویورک, न्यूयॉर्क, নিউ ইয়র্ক সিটি, நியூயார்க் நகரம், นครนิวยอร์ก, ნიუ-იორკი, ニューヨーク, マンハッタン, 紐約市, 纽约, 뉴욕, 뉴욕 시
Population
8,804,190
Currency
Dollar (USD)
Geographic Coordinates
40° 42' N Latitude / 74° 00' W Longitude
International Dialing Code
+1
More About New York City
New York City local time and city facts

Salvador Time Zone and Facts

Time Zone

Abbreviation / Offset
BRT – Brasilia Time, UTC-3 (no daylight saving time)

Salvador Facts

Country
Brazil
Alternative Names
Bahia, Baia, Baía, SSA, Sal'vador, Salvador, Salvador da Bahia, Salvador de Bahia, Salvador de Bahio, Salvador de Bahía, Salvadora, Salvadoras, Sao Salvador, Soteropolis, sa er wa duo, sal wad xr, salabhadora, salfadwr bahya, salvadori, salvhadora da ba'iya, salwadwr, sarubadoru, saruvu~adoru, saubadoleu, slbdwr, slwadwr, Σαλβαδόρ, Салвадор, Сальвадор, סלבדור, سالفادور، باهيا, سالوادور, سلوادور, साल्व्हादोर दा बाईया, সালভাদোর, ซัลวาดอร์, სალვადორი, サルバドール, サルヴァドール, 萨尔瓦多, 사우바도르
Population
2,711,840
Currency
Real (BRL)
Geographic Coordinates
12° 58' S Latitude / 38° 30' W Longitude
International Dialing Code
+55
More About Salvador
Salvador local time and city facts

London Time Zone and Facts

Time Zone

Abbreviation / Offset
BST – British Summer Time, UTC+1 (now, daylight saving time)
GMT – Greenwich Mean Time, UTC+0 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, October 25, 2026 at 2:00 amSunday, October 25, 2026 at 02:00: clocks go back 1 hour to 1:00 am01:00 (GMT). DST ends on the last Sunday of October each year. Also called Fall Back or Winter Time.
Daylight Saving Time Starts
123456789101112Sunday, March 28, 2027 at 1:00 amSunday, March 28, 2027 at 01:00: clocks go forward 1 hour to 2:00 am02:00 (BST). DST starts on the last Sunday of March each year. Also called Spring Forward or Summer Time.
Clock Changes
United Kingdom daylight saving time · Clock changes worldwide

London Facts

Country
United Kingdom
Alternative Names
ILondon, LON, Lakana, Landan, Landen, Ljondan, Llundain, Lodoni, Londain, Londan, Londar, Londe, Londen, Londin, Londinium, Londino, Londn, London, London osh, Londona, Londonas, Londoni, Londono, Londons, Londonu, Londra, Londres, Londrez, Londri, Londro, Londye, Londyn, Londýn, Lonn, Lontoo, Loundres, Luan GJon, Lun-tun, Lunden, Lundra, Lundun, Lundunir, Lundúnir, Lung-dung, Lunnainn, Lunnin, Lunnon, Luân Đôn, Lùn-tûn, Lùng-dŭng, Lûn-tun, Lākana, Lůndůn, Lọndọnu, Ranana, Rānana, ilantan, ladana, landan, landana, leondeon, lndn, london, londoni, lun dui, lun dun, lwndwn, lxndxn, rondon, Łondra, Λονδίνο, Лондан, Лондон, Лондон ош, Лондонъ, Лёндан, Լոնդոն, לאנדאן, לונדון, لأندأن, لندن, لوندون, لەندەن, ܠܘܢܕܘܢ, लंडन, लंदन, लण्डन, लन्डन्, लन्दन, লন্ডন, ਲੰਡਨ, લંડન, ଲଣ୍ଡନ, இலண்டன், లండన్, ಲಂಡನ್, ലണ്ടൻ, ලන්ඩන්, ลอนดอน, ລອນດອນ, ལོན་ཊོན།, လန်ဒန်မြို့, ლონდონი, ለንደን, ᎫᎴ ᏗᏍᎪᏂᎯᏱ, ロンドン, 伦敦, 倫敦, 런던
Population
8,961,989
Currency
Pound (GBP)
Geographic Coordinates
51° 30' N Latitude / 0° 07' W Longitude
International Dialing Code
+44
More About London
London local time and city facts

Tokyo Time Zone and Facts

Time Zone

Abbreviation / Offset
JST – Japan Standard Time, UTC+9 (no daylight saving time)

Tokyo Facts

Country
Japan
Alternative Names
Edo, TYO, Tochiu, Tocio, Tokija, Tokijas, Tokio, Tokió, Tokjo, Tokyo, Toquio, Toquio - dong jing, Toquio - 東京, Tòquio, Tókýó, Tóquio, Tōkyō, dokyo, dong jing, dong jing dou, dong-gyeong, tokeiyw, toki'o, tokkiyo, tokyo, twkyw, twqyw, Τόκιο, Токио, Токё, Токіо, Տոկիո, טוקיו, توكيو, توکیو, طوكيو, ܛܘܟܝܘ, ܜܘܟܝܘ, टोक्यो, টোকিও, டோக்கியோ, โตเกียว, ტოკიო, 东京, 東京, 東京都, 도쿄, 동경
Population
9,733,276
Currency
Yen (JPY)
Geographic Coordinates
35° 41' N Latitude / 139° 41' E Longitude
International Dialing Code
+81
More About Tokyo
Tokyo local time and city facts

Sydney Time Zone and Facts

Time Zone

Abbreviation / Offset
AEDT – Australian Eastern Daylight Time, UTC+11 (now, daylight saving time)
AEST – Australian Eastern Standard Time, UTC+10 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, April 4, 2027 at 3:00 amSunday, April 4, 2027 at 03:00: clocks go back 1 hour to 2:00 am02:00 (AEST). DST ends on the 1st Sunday of April each year. Also called Fall Back or Winter Time.
Daylight Saving Time Starts
123456789101112Sunday, October 3, 2027 at 2:00 amSunday, October 3, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (AEDT). DST starts on the 1st Sunday of October each year. Also called Spring Forward or Summer Time.
Clock Changes
Australia daylight saving time · Clock changes worldwide

Sydney Facts

Country
Australia
Alternative Names
SYD, Sanctus Dionysius, Sedniejos, Sek-na, Sidnef, Sidnei, Sidnej, Sidneja, Sidnejo, Sidnejus, Sidney, Sidneý, Sidni, Sidnéy, Sidnėjus, Sit-ni, Sit-nì, Syd, Sydneium, Sydney, Sydney City, Sék-nà̤, Sídney, Sîdney, Sėdniejos, citni, shidoni, sidani, sideuni, sidnei, sidni, sidniy, sydny, xi ni, xue li, Σίδνεϋ, Сиднеи, Сидней, Сиднеј, Сидни, Сідней, Сідні, Սիդնեյ, סידני, سيدنى, سيدني, سڈنی, سیدنی, ܣܝܕܢܝ, सिडनी, सिड्नी, सिद्नी, সিডনি, ਸਿਡਨੀ, સીડની, சிட்னி, సిడ్నీ, ಸಿಡ್ನಿ, സിഡ്നി, සිඩ්නි, ซิดนีย์, སིད་ནེ།, ဆစ်ဒနီမြို့, სიდნეი, ሲድኒ, ស៊ីដនីយ៏, シドニー, 悉尼, 雪梨, 시드니
Population
5,638,830
Currency
Dollar (AUD)
Geographic Coordinates
33° 52' S Latitude / 151° 12' E Longitude
International Dialing Code
+61
More About Sydney
Sydney local time and city facts
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT