Time difference routes
Open a prefilled calculator for common time difference routes, then adjust the date and time to account for daylight-saving changes.
US and UK daylight-saving changes do not always happen in the same week.
Los Angeles to TokyoTokyo does not use daylight saving time, while California changes offset seasonally.
London to SydneyThe UK and Sydney shift clocks in opposite seasons, so the difference changes during the year.
San Francisco to LondonCalifornia and the UK have different daylight-saving transition dates.
New York to TokyoTokyo keeps a stable UTC offset, while New York changes during daylight saving time.
London to SingaporeSingapore does not use daylight saving time, while London changes seasonally.
Paris to New YorkEurope and the US often switch daylight saving time on different dates.
Sydney to New YorkSydney and New York change clocks in opposite seasons, so the offset can swing widely.
New York to Los AngelesBoth cities use US daylight-saving rules, so the offset is usually stable at three hours, but exact dates still matter.
London to New YorkUK and US daylight-saving transitions do not always happen on the same dates.
Tokyo to New YorkTokyo does not use daylight saving time, while New York changes seasonally.
Singapore to New YorkSingapore stays on UTC+8, while New York changes during daylight saving time.
Singapore to LondonSingapore does not use daylight saving time, while London changes between GMT and BST.
Sydney to LondonSydney and London shift clocks in opposite seasons, so the offset can change significantly.
Los Angeles to LondonCalifornia and the UK have different daylight-saving transition dates.
California to IndiaIndia does not use daylight saving time, while California changes seasonally.
India to New YorkIndia stays on UTC+5:30, while New York changes seasonally.
Paris to TokyoTokyo stays fixed, while Paris changes between CET and CEST.
Berlin to New YorkGermany and the US often switch daylight saving time on different dates.
Toronto to LondonToronto follows North American daylight-saving timing, which can differ from the UK.
New York to SingaporeSingapore stays on UTC+8, while New York changes during daylight saving time.
Los Angeles to SingaporeSingapore does not use daylight saving time, while California changes offset seasonally.
Chicago to LondonChicago and London both change clocks, but their transition dates can be different.
Dallas to IndiaIndia stays on UTC+5:30, while Dallas changes during daylight saving time.
Seattle to IndiaIndia stays on UTC+5:30 and does not use daylight saving time, while Seattle changes seasonally.
Austin to LondonAustin and London both use daylight-saving rules, but their transition dates can differ.
San Francisco to IndiaIndia uses a fixed half-hour offset, while San Francisco changes during daylight saving time.
Boston to LondonBoston follows US Eastern daylight-saving timing, while London changes between GMT and BST on UK dates.
Miami to LondonMiami follows US Eastern daylight-saving timing, which can differ from the UK transition weeks.
Atlanta to IndiaIndia stays on UTC+5:30 all year, while Atlanta changes during US daylight saving time.
Denver to IndiaIndia uses a fixed half-hour offset, while Denver changes during daylight saving time.
Phoenix to IndiaPhoenix usually stays on Mountain Standard Time year-round, while India stays fixed at UTC+5:30.
Seattle to TokyoTokyo keeps a stable UTC offset, while Seattle changes offset seasonally.
California to ChinaChina stays on China Standard Time, while California changes during daylight saving time.
New York to IndiaIndia uses a half-hour offset and does not use daylight saving time, while New York changes seasonally.
London to DubaiDubai stays on Gulf Standard Time, while London changes between GMT and BST.
Dubai to New YorkDubai does not use daylight saving time, while New York changes seasonally.
London to IndiaIndia stays on UTC+5:30, while London changes between GMT and BST.
Tokyo to LondonTokyo does not use daylight saving time, while London changes seasonally.
Sydney to SingaporeSydney changes clocks seasonally, while Singapore stays on UTC+8 all year.
US to PhilippinesThis page uses US Eastern Time as the reference clock; Central, Mountain, Pacific, Alaska, and Hawaii need separate local adjustment before calling the Philippines.
UK to AustraliaThis page uses London and Sydney as reference clocks; Australia spans several time zones, and daylight-saving rules differ by state.
US to IndiaThis page uses US Eastern Time as the reference clock and India Standard Time as the destination clock.
US to AustraliaThis page uses US Eastern Time and Sydney as reference clocks; both countries have multiple local time zones.
UK to IndiaIndia uses a half-hour offset and remains fixed year-round, while the UK changes between GMT and BST.
Canada to IndiaThis page uses Toronto/Eastern Time as the Canadian reference clock and India Standard Time as the destination clock.
US to UKThis page uses US Eastern Time and London as reference clocks; daylight-saving changes do not always happen in the same week.
New York to DubaiDubai stays fixed on Gulf Standard Time, while New York changes during daylight saving time.
London to Hong KongHong Kong stays fixed year-round, while London changes between GMT and BST.
Los Angeles to SydneyLos Angeles and Sydney change clocks in opposite seasons, so the difference can shift significantly.
Chicago to IndiaIndia uses a fixed half-hour offset, while Chicago changes during daylight saving time.
Toronto to IndiaIndia stays fixed at UTC+5:30, while Toronto changes seasonally with Eastern Time.
San Francisco to SingaporeSingapore does not use daylight saving time, while San Francisco changes seasonally.
Seattle to LondonSeattle and London both change for daylight saving time, but the transition dates do not always match.
Boston to IndiaIndia stays fixed at UTC+5:30, while Boston changes seasonally with Eastern Time.
New York to Hong KongHong Kong does not use daylight saving time, while New York changes seasonally with Eastern Time.
London to TokyoTokyo stays on a fixed offset, while London changes between GMT and British Summer Time.
San Francisco to TokyoTokyo does not use daylight saving time, while San Francisco changes seasonally.
Dallas to LondonDallas and London both use daylight saving time, with a short seasonal mismatch around switch dates.
Miami to DubaiDubai stays on Gulf Standard Time year-round, while Miami changes seasonally with Eastern Time.
A fixed offset is often wrong for future planning. New York and London, for example, usually differ by five hours, but the gap can briefly change when the United States and the United Kingdom switch daylight-saving time on different dates.
Route pages keep the comparison tied to a selected date and to place-based IANA zones, so the result can follow local daylight-saving rules instead of relying on a memorized offset.
Time differences are date-sensitive because daylight-saving changes can shift one location before another. These reference links keep the data method, editorial review process, correction path, and advertising privacy details available in the page body.
Daylight-saving changes can happen on different dates, and some places do not change clocks at all.
City names and IANA zones are safer than short abbreviations because they include local date rules.
Each route opens as a starting point; the comparison can be adjusted for another date, time, or place.