EDT vs GMT
Nruab nrab EDT thiab GMT, muaj qhov sib txawv ntawm 4 teev. Tab sis, kom nkag siab tias qhov no tau muab los ntawm, ua ntej cia peb pom dab tsi EDT thiab GMT sawv cev rau thiab lub hom phiaj ntawm kev muaj cov qauv sib txawv. EDT sawv rau Eastern Daylight Time thaum GMT sawv rau Greenwich Mean Time. EDT tau ua raws li ua kom tib neeg lub neej yooj yim dua thaum GMT ua raws thoob plaws ntiaj teb kom cia peb txhua tus ua raws sijhawm. GMT yog ua raws li kev soj ntsuam astronomical. Qhov no yeej yog lub teb chaws raws sij hawm tus qauv. Hauv tsab xov xwm no, peb yuav tham ntxiv txog EDT thiab GMT thiab sim nkag siab qhov txawv ntawm EDT thiab GMT.
GMT yog dab tsi?
Lub ntiaj teb tau muab faib ua ntau lub sijhawm, thiab txhua qhov chaw muaj lub sijhawm hauv zos thiab tseem muaj sijhawm sib raug zoo nrog GMT, uas yog hu ua Greenwich Mean Time. Greenwich yog ib qho chaw hauv tebchaws Askiv los ntawm qhov chaw txhua lub sijhawm hauv ntiaj teb raug ntsuas. Nws yog Prime Meridian lossis Greenwich Meridian (longitude xoom degrees) uas yog qhov pib rau txhua lub sijhawm hauv ntiaj teb. GMT kuj tau hais tias yog Lub Sijhawm Ntiaj Teb, thiab nws teem sijhawm tam sim no ntawm txhua qhov chaw hauv ntiaj teb. Tsis ntev los no, txawm li cas los xij, nws tau hloov los ntawm UTC (Lub Sijhawm Sib Koom Tes Universal) uas yog raws li lub moos atomic thiab suav tias yog qhov tseeb dua.
Ntiaj teb xoom kab ntawm longitude hla Greenwich thiab hu ua Greenwich Meridian. Yog tias koj nyob hauv ib lub tebchaws sab hnub tuaj ntawm GMT, koj ua ntej ntawm GMT. Piv txwv li, lub sij hawm hauv zos hauv Is Nrias teb yog GMT + 5.5 teev. Ntawm qhov tod tes, sab hnub poob ntawm GMT, lub sijhawm hauv zos yog qab GMT. Yog tias koj nyob hauv NY, lub sijhawm hauv lub caij ntuj sov yog GMT - 4 teev thiab GMT - 5 teev nyob rau lub caij ntuj no. Raws li koj tuaj yeem pom, GMT + qhia tias lub sijhawm thaj tsam yog sab hnub tuaj ntawm GMT thiab GMT - qhia tias lub sijhawm thaj tsam yog sab hnub poob ntawm GMT.
EDT yog dab tsi?
EDT, ntawm qhov tod tes, yog hu ua Eastern Daylight Time thiab hais txog thaj tsam lub sijhawm uas yog 4 teev tom qab GMT lossis UTC. EDT yog siv rau sab hnub tuaj ntawm Asmeskas thiab Canada. Nws kuj tseem siv tau hauv Caribbean. Hauv qee cov ntaub ntawv, nws tseem hu ua Eastern Daylight Savings Time, uas yog ib qho kev txuag lub sij hawm nyob rau hauv ib lub sij hawm ntawm lub xyoo los ntawm kev nce lub moos los ntawm ib teev. EDT feem ntau yog siv rau lub caij ntuj sov nyob rau sab hnub tuaj ntawm North American Continent. EDT pib thaum 3 teev sawv ntxov hnub Sunday thib ob ntawm lub Peb Hlis (2 teev sawv ntxov EST) thiab txuas ntxiv mus txog hnub Sunday thawj lub Kaum Ib Hlis. Nws xaus rau hnub no ntawm 2 AM EDT, uas tau hloov mus rau 1 AM EST. EDT yog lub sijhawm tam sim no hauv Greenwich rho tawm plaub teev. Nws txhais tau hais tias thaum tav su ntawm Greenwich, nws yog 8 teev sawv ntxov hauv thaj tsam EDT lub sijhawm.
EDT=GMT – 4 teev
Qhov txawv ntawm EDT thiab GMT yog dab tsi?
• GMT stands rau Greenwich Mean Time.
• EDT sawv rau Eastern Daylight Time.
• Txhua lub sijhawm thaj tsam thoob ntiaj teb xa mus rau GMT (tam sim no mus rau UTC) thaum qhia lawv lub sijhawm. Txhua lub sijhawm thaj tsam yog ua ntej GMT lossis tom qab GMT. Lub sijhawm thaj tsam uas nyob tom ntej yog cov nyob sab hnub tuaj mus rau Prime Meridian raws li GMT kab kos. Lub sijhawm thaj tsam tom qab GMT yog cov nyob sab hnub poob mus rau Prime Meridian.
• EDT yog thaj tsam lub sijhawm uas yog 4 teev tom qab GMT lossis UTC.
• GMT yog siv thoob plaws ntiaj teb. Txawm li cas los xij, EDT tsuas yog siv hauv North America thiab Caribbean.
• GMT yog siv thoob plaws lub xyoo. EDT tsuas yog siv rau lub caij ntuj sov xwb.
