London to Philadelphia to Houston to SGT to Prague Time Converter

Updating current time…
London
United KingdomBST
UTC+1
12am
3am
6am
9am
12pm
3pm
6pm
9pm
London's clocks go back 1 hour on Sun, Oct 25 · BST → GMT
Philadelphia
Pennsylvania, USAEDT
UTC−4
5h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Philadelphia's clocks go back 1 hour on Sun, Nov 1 · EDT → EST
Houston
Texas, USACDT
UTC−5
6h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Houston's clocks go back 1 hour on Sun, Nov 1 · CDT → CST
SGT
Singapore Time
UTC+8
7h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Prague
CzechiaCEST
UTC+2
1h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Prague's clocks go back 1 hour on Sun, Oct 25 · CEST → CET

Quick answers

Selected conversion

1:00 pm13:00 BST (UTC+1), Oct 21, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 21, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 21, 2026 = 8:00 pm20:00 SGT (UTC+8), Oct 21, 2026 = 2:00 pm14:00 CEST (UTC+2), Oct 21, 2026

London is 5 hours ahead of Philadelphia. London is 6 hours ahead of Houston. London is 7 hours behind SGT. London is 1 hour behind Prague.

How the time difference changes

London to Philadelphia

For most of the year, London is 5 hours ahead of Philadelphia. From Oct 25 to Nov 1, 2026, and from Mar 14 to Mar 28, 2027, London is 4 hours ahead of Philadelphia.

For most of the year, working hours of 9:00 am to 6:00 pm in London correspond to 4:00 am to 1:00 pm in Philadelphia. At other times of the year, working hours of 9:00 am to 6:00 pm in London correspond to 5:00 am to 2:00 pm in Philadelphia.For most of the year, working hours of 09:00 to 18:00 in London correspond to 04:00 to 13:00 in Philadelphia. At other times of the year, working hours of 09:00 to 18:00 in London correspond to 05:00 to 14:00 in Philadelphia.

London to Houston

For most of the year, London is 6 hours ahead of Houston. From Oct 25 to Nov 1, 2026, and from Mar 14 to Mar 28, 2027, London is 5 hours ahead of Houston.

For most of the year, working hours of 9:00 am to 6:00 pm in London correspond to 3:00 am to 12:00 pm in Houston. At other times of the year, working hours of 9:00 am to 6:00 pm in London correspond to 4:00 am to 1:00 pm in Houston.For most of the year, working hours of 09:00 to 18:00 in London correspond to 03:00 to 12:00 in Houston. At other times of the year, working hours of 09:00 to 18:00 in London correspond to 04:00 to 13:00 in Houston.

London to SGT

For most of the year, London is 7 hours behind SGT. From Oct 25, 2026 to Mar 28, 2027, London is 8 hours behind SGT.

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

London to Prague

London is 1 hour behind Prague year-round.

Working hours of 9:00 am to 6:00 pm in London correspond to 10:00 am to 7:00 pm in Prague.Working hours of 09:00 to 18:00 in London correspond to 10:00 to 19:00 in Prague.

Compare London time with Philadelphia, Houston, SGT, and Prague time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

BST (British Summer Time) is 5 hours ahead of EDT (Eastern Daylight Time). BST (British Summer Time) is 6 hours ahead of CDT (Central Daylight Time). BST (British Summer Time) is 7 hours behind Singapore Time. BST (British Summer Time) is 1 hour behind CEST (Central European Summer Time).
1:00 pm13:00 in London, United Kingdom is 8:00 am08:00 in Philadelphia, PA, USA and is 7:00 am07:00 in Houston, TX, USA and is 8:00 pm20:00 in SGT and is 2:00 pm14:00 in Prague, Czechia

London to Philadelphia call time
Best time for a conference call or a meeting is between 2pm-6pm14:00-18:00 in London which corresponds to 9am-1pm09:00-13:00 in Philadelphia
London to Houston call time
Best time for a conference call or a meeting is between 3pm-6pm15:00-18:00 in London which corresponds to 9am-12pm09:00-12:00 in Houston
London to SGT call time
Best time for a conference call or a meeting is between 9am-11am09:00-11:00 in London which corresponds to 4pm-6pm16:00-18:00 in SGT
London to Prague call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in London which corresponds to 10am-6pm10:00-18:00 in Prague

1:00 pm13:00 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
8:00 am08:00 EDT (Eastern Daylight Time) (Philadelphia, PA, USA). Offset UTC -4:00 hours
7:00 am07:00 CDT (Central Daylight Time) (Houston, TX, USA). Offset UTC -5:00 hours
8:00 pm20:00 Singapore Time (SGT). Offset UTC +8:00 hours
2:00 pm14:00 CEST (Central European Summer Time) (Prague, Czechia). Offset UTC +2:00 hours

1:00 pm13:00 London, United Kingdom / 8:00 am08:00 Philadelphia, PA, USA / 7:00 am07:00 Houston, TX, USA / 8:00 pm20:00 SGT / 2:00 pm14:00 Prague, Czechia

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
London, United KingdomPhiladelphia, PA, USAHouston, TX, USASGTPrague, Czechia
7:00pm previous day6:00pm previous day7:00am1:00am
8:00pm previous day7:00pm previous day8:00am2:00am
9:00pm previous day8:00pm previous day9:00am3:00am
10:00pm previous day9:00pm previous day10:00am4:00am
11:00pm previous day10:00pm previous day11:00am5:00am
12:00am11:00pm previous day12:00pm6:00am
1:00am12:00am1:00pm7:00am
2:00am1:00am2:00pm8:00am
3:00am2:00am3:00pm9:00am
4:00am3:00am4:00pm10:00am
5:00am4:00am5:00pm11:00am
6:00am5:00am6:00pm12:00pm
7:00am6:00am7:00pm1:00pm
8:00am7:00am8:00pm2:00pm
9:00am8:00am9:00pm3:00pm
10:00am9:00am10:00pm4:00pm
11:00am10:00am11:00pm5:00pm
12:00pm11:00am12:00am next day6:00pm
1:00pm12:00pm1:00am next day7:00pm
2:00pm1:00pm2:00am next day8:00pm
3:00pm2:00pm3:00am next day9:00pm
4:00pm3:00pm4:00am next day10:00pm
5:00pm4:00pm5:00am next day11:00pm
6:00pm5:00pm6:00am next day12:00am next day
19:00 previous day18:00 previous day07:0001:00
20:00 previous day19:00 previous day08:0002:00
21:00 previous day20:00 previous day09:0003:00
22:00 previous day21:00 previous day10:0004:00
23:00 previous day22:00 previous day11:0005:00
00:0023:00 previous day12:0006:00
01:0000:0013:0007:00
02:0001:0014:0008:00
03:0002:0015:0009:00
04:0003:0016:0010:00
05:0004:0017:0011:00
06:0005:0018:0012:00
07:0006:0019:0013:00
08:0007:0020:0014:00
09:0008:0021:0015:00
10:0009:0022:0016:00
11:0010:0023:0017:00
12:0011:0000:00 next day18:00
13:0012:0001:00 next day19:00
14:0013:0002:00 next day20:00
15:0014:0003:00 next day21:00
16:0015:0004:00 next day22:00
17:0016:0005:00 next day23:00
18:0017:0006:00 next day00:00 next day

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 time now
Current Time in the United Kingdom
UK time now

Philadelphia 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

Philadelphia Facts

Country
USA
State
Pennsylvania
Alternative Names
Coaquannock, Fi-sang, Fi-sàng, Filadehl'fija, Filadel'fi, Filadel'fij, Filadel'fija, Filadelfi, Filadelfia, Filadelfiae, Filadelfie, Filadelfii, Filadelfija, Filadelfijo, Filadelfio, Filadelfiya, Filadelfiye, Filadelfiä, Filadèlfia, Filadélfia, Filadélfiye, Ga-na-ta-jen-go-na, PHL, Philadelpheia, Philadelphia, Philadelphie, Philly, Quequenakee, Tsi wahswen:to Tekahso:ken, Tsi wahswèn:to Tekahsó:ken, fei cheng, fi la delfeiy, filadailafi'a, firaderufia, flaڈylfya, fyladlfya, fyladlfya pnsylwanya, philadelaphiya, philadelphiya, piladelpia, pilatelpiya, pilladelpia, pyldlpyh, Φιλαδέλφεια, Филаделфиа, Филаделфия, Филаделфија, Филадельфи, Филадельфий, Филадельфия, Філадельфія, Філадэльфія, Ֆիլադելֆիա, פילאדעלפיע, פילדלפיה, فلاڈیلفیا, فلاڈیلفیا، پنسلوانیا, فيلادلفيا, فیلادلفیا, فیلادلفیا، پنسیلوانیا, फिलाडेल्फिया, ফিলাডেলফিয়া, ਫ਼ਿਲਾਡੈਲਫ਼ੀਆ, ફિલાડેલ્ફિયા, பிலடெல்பியா, ఫిలడెల్ఫియా, ಫಿಲಡೆಲ್ಫಿಯಾ, ഫിലഡെൽഫിയ, ฟิลาเดลเฟีย, ဖီလာဒဲလ်ဖီးယားမြို့, ფილადელფია, ፊላዴልፊያ, ភីឡាដេលផ្យា, フィラデルフィア, 費城, 费城, 필라델피아
Population
1,573,916
Currency
Dollar (USD)
Geographic Coordinates
39° 57' N Latitude / 75° 09' W Longitude
International Dialing Code
+1
More About Philadelphia
Philadelphia local time and city facts

Houston Time Zone and Facts

Time Zone

Abbreviation / Offset
CDT – Central Daylight Time, UTC-5 (now, daylight saving time)
CST – Central Standard Time, UTC-6 (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 (CST). 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 (CDT). 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

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

Singapore Time

Offset: SGT is 8 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Singapore

Principal Cities: The largest city in the SGT time zone is Singapore in Singapore, with about 5.639 million people.

Daylight Saving: Clocks in Singapore Time (SGT) do not change for daylight saving time, so SGT 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 Singapore: Singapore time now

Map of the areas on Singapore Time (SGT)
SGT all year

Open the world time zone map© OpenStreetMap

SGT 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 SGT
  • H - short form of 'Hotel'
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

Prague Time Zone and Facts

Time Zone

Abbreviation / Offset
CEST – Central European Summer Time, UTC+2 (now, daylight saving time)
CET – Central European Time, UTC+1 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, October 25, 2026 at 3:00 amSunday, October 25, 2026 at 03:00: clocks go back 1 hour to 2:00 am02:00 (CET). 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 2:00 amSunday, March 28, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (CEST). DST starts on the last Sunday of March each year. Also called Spring Forward or Summer Time.
Clock Changes
Czechia daylight saving time · Clock changes worldwide

Prague Facts

Country
Czechia
Alternative Names
PRG, Praag, Prag, Praga, Pragae, Prago, Prague, Praha, Pràg, Prág, Prága, Prâg, Prāga, bragh, bu la ge, peulaha, prag, praga, prak, prg, puraha, Πράγα, Праг, Прагæ, Прага, פראג, براغ, پراگ, پراگا, ܦܪܓ, প্রাগ, ปราก, པུ་ལ་ཁེ, პრაღა, ፕራግ, プラハ, 布拉格, 프라하
Population
1,165,581
Currency
Koruna (CZK)
Geographic Coordinates
50° 05' N Latitude / 14° 25' E Longitude
International Dialing Code
+420
More About Prague
Prague local time and city facts
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT