{"id":301878,"date":"2023-12-31T13:12:38","date_gmt":"2023-12-31T06:12:38","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=301878"},"modified":"2023-12-31T13:12:38","modified_gmt":"2023-12-31T06:12:38","slug":"gio-utc","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/gio-utc\/","title":{"rendered":"Gi\u01a1\u0300 UTC la\u0300 gi\u0300? Ca\u0301ch \u0111\u00f4\u0309i gi\u01a1\u0300 UTC sang gi\u01a1\u0300 Vi\u00ea\u0323t Nam \u0111\u01a1n gia\u0309n va\u0300 nhanh cho\u0301ng"},"content":{"rendered":"

UTC \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 h\u1ec7 th\u1ed1ng th\u1eddi gian qu\u1ed1c t\u1ebf, lo\u1ea1i gi\u1edd n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ea5t nhi\u1ec1u \u1edf c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c nhau nh\u01b0 h\u00e0ng kh\u00f4ng, internet, ti\u1ec1n \u0111i\u1ec7n t\u1eed v\u00e0 h\u01a1n th\u1ebf n\u1eefa. V\u1eady b\u1ea1n \u0111\u00e3 bi\u1ebft gi\u1edd UTC<\/strong> ch\u00ednh x\u00e1c l\u00e0 g\u00ec ch\u01b0a? C\u00e1ch \u0111\u1ed5i UTC sang gi\u1edd \u0111\u1ecba ph\u01b0\u01a1ng nh\u01b0 th\u1ebf n\u00e0o l\u00e0 ph\u00f9 h\u1ee3p? T\u1ea5t c\u1ea3 c\u00e1c th\u00f4ng tin n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp \u0111\u1ea7y \u0111\u1ee7 trong b\u00e0i vi\u1ebft.<\/p>\n

Gi\u01a1\u0300 UTC l\u00e0 g\u00ec?<\/h2>\n

UTC hay Coordinated Universal Time (Th\u1eddi gian Ph\u1ed1i h\u1ee3p Qu\u1ed1c t\u1ebf) l\u00e0 ti\u00eau chu\u1ea9n th\u1eddi gian m\u00e0 theo \u0111\u00f3 th\u1ebf gi\u1edbi \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed3ng h\u1ed3 v\u00e0 th\u1eddi gian. UTC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u1eddi gian tr\u00ean kh\u1eafp th\u1ebf gi\u1edbi m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. N\u00f3 g\u1ea7n gi\u1ed1ng v\u1edbi Gi\u1edd Trung B\u00ecnh Greenwich (GMT), nh\u01b0ng c\u00f3 m\u1ed9t s\u1ed1 kh\u00e1c bi\u1ec7t k\u1ef9 thu\u1eadt nh\u1ecf.<\/p>\n

\"gio-utc\"<\/picture><\/p>\n

UTC kh\u00f4ng thay \u0111\u1ed5i theo m\u00f9a gi\u1ed1ng nh\u01b0 gi\u1edd ti\u1ebft ki\u1ec7m \u00e1nh s\u00e1ng ban ng\u00e0y (DST). V\u00ed d\u1ee5, n\u1ebfu m\u1ed9t \u0111\u1ecba ph\u01b0\u01a1ng \u00e1p d\u1ee5ng DST, th\u1eddi gian \u0111\u1ecba ph\u01b0\u01a1ng c\u1ee7a h\u1ecd s\u1ebd thay \u0111\u1ed5i so v\u1edbi UTC trong nh\u1eefng th\u00e1ng \u0111\u00f3, nh\u01b0ng UTC lu\u00f4n gi\u1eef nguy\u00ean. Qua \u0111\u00f3 l\u00e0m cho UTC tr\u1edf th\u00e0nh m\u1ed9t ti\u00eau chu\u1ea9n th\u1eddi gian quan tr\u1ecdng v\u00e0 \u0111\u00e1ng tin c\u1eady cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng qu\u1ed1c t\u1ebf, nh\u1ea5t l\u00e0 trong l\u0129nh v\u1ef1c giao th\u00f4ng v\u1eadn t\u1ea3i, th\u00f4ng tin li\u00ean l\u1ea1c, v\u00e0 khoa h\u1ecdc.<\/p>\n

L\u1ecbch s\u1eed ra \u0111\u1eddi v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a gi\u1edd UTC<\/h2>\n

L\u1ecbch s\u1eed c\u1ee7a UTC b\u1eaft \u0111\u1ea7u t\u1eeb nhu c\u1ea7u c\u00f3 m\u1ed9t ti\u00eau chu\u1ea9n th\u1eddi gian qu\u1ed1c t\u1ebf ch\u00ednh x\u00e1c. Tr\u01b0\u1edbc \u0111\u00e2y, m\u1ed7i n\u01a1i tr\u00ean th\u1ebf gi\u1edbi s\u1eed d\u1ee5ng th\u1eddi gian d\u1ef1a tr\u00ean v\u1ecb tr\u00ed c\u1ee7a M\u1eb7t Tr\u1eddi, t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn gi\u1eefa c\u00e1c khu v\u1ef1c. \u0110i\u1ec1u n\u00e0y tr\u1edf n\u00ean kh\u00f4ng ti\u1ec7n l\u1ee3i, nh\u1ea5t l\u00e0 khi giao th\u00f4ng v\u00e0 th\u00f4ng tin li\u00ean l\u1ea1c qu\u1ed1c t\u1ebf ph\u00e1t tri\u1ec3n m\u1ea1nh.<\/p>\n

L\u00fac n\u00e0y, gi\u1edd GMT, hay Gi\u1edd Trung B\u00ecnh Greenwich \u0111\u01b0\u1ee3c d\u00f9ng r\u1ed9ng r\u00e3i t\u1eeb th\u1ebf k\u1ef7 19. Tuy nhi\u00ean, v\u1edbi s\u1ef1 ti\u1ebfn b\u1ed9 c\u1ee7a khoa h\u1ecdc, ng\u01b0\u1eddi ta nh\u1eadn ra GMT c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf. C\u1ee5 th\u1ec3, n\u00f3 d\u1ef1a tr\u00ean qu\u1ef9 \u0111\u1ea1o c\u1ee7a M\u1eb7t Tr\u1eddi, kh\u00f4ng \u0111\u1ee7 ch\u00ednh x\u00e1c cho m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng khoa h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt.<\/p>\n

\"gio-utc-1\"<\/picture><\/p>\n

V\u00ec v\u1eady, v\u00e0o n\u0103m 1960, gi\u1edd UTC<\/strong> ra \u0111\u1eddi, d\u1ef1a tr\u00ean \u0111\u1ed3ng h\u1ed3 nguy\u00ean t\u1eed ch\u00ednh x\u00e1c. UTC k\u1ebft h\u1ee3p s\u1ef1 ch\u00ednh x\u00e1c c\u1ee7a th\u1eddi gian nguy\u00ean t\u1eed v\u1edbi s\u1ef1 ti\u1ec7n l\u1ee3i c\u1ee7a GMT. \u0110i\u1ec1u n\u00e0y gi\u00fap UTC tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n th\u1eddi gian \u0111\u00e1ng tin c\u1eady tr\u00ean to\u00e0n c\u1ea7u, kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi thay \u0111\u1ed5i m\u00f9a hay v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd.<\/p>\n

H\u1ec7 th\u1ed1ng UTC kh\u00f4ng ch\u1ec9 h\u1ed7 tr\u1ee3 cho vi\u1ec7c di chuy\u1ec3n v\u00e0 giao ti\u1ebfp qu\u1ed1c t\u1ebf m\u00e0 c\u00f2n quan tr\u1ecdng trong l\u0129nh v\u1ef1c khoa h\u1ecdc. N\u00f3 \u0111\u00f3ng vai tr\u00f2 c\u1ed1t l\u00f5i trong c\u00e1c nghi\u00ean c\u1ee9u v\u0169 tr\u1ee5, d\u1ef1 b\u00e1o th\u1eddi ti\u1ebft, v\u00e0 nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c. UTC th\u1ef1c s\u1ef1 l\u00e0 m\u1ed9t th\u00e0nh t\u1ef1u n\u1ed5i b\u1eadt, ph\u1ea3n \u00e1nh s\u1ef1 ti\u1ebfn b\u1ed9 kh\u00f4ng ng\u1eebng c\u1ee7a con ng\u01b0\u1eddi trong vi\u1ec7c kh\u00e1m ph\u00e1 v\u00e0 \u1ee9ng d\u1ee5ng khoa h\u1ecdc.<\/p>\n

M\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a m\u00fai UTC<\/h2>\n

C\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y, gi\u1edd UTC<\/strong> l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa Gi\u1edd nguy\u00ean t\u1eed qu\u1ed1c t\u1ebf (TAI) v\u00e0 Gi\u1edd qu\u1ed1c t\u1ebf (UT1). H\u00e3y c\u00f9ng kh\u00e1m ph\u00e1 hai th\u00e0nh ph\u1ea7n ch\u00ednh n\u00e0y \u0111\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 UTC.<\/p>\n

\u0110\u1ea7u ti\u00ean, ch\u00fang ta c\u00f3 Gi\u1edd nguy\u00ean t\u1eed qu\u1ed1c t\u1ebf (TAI). TAI l\u00e0 th\u1eddi gian d\u1ef1a tr\u00ean s\u1ef1 \u0111\u1ed3ng b\u1ed9 c\u1ee7a h\u01a1n 200 \u0111\u1ed3ng h\u1ed3 nguy\u00ean t\u1eed tr\u00ean kh\u1eafp th\u1ebf gi\u1edbi. \u0110\u1ed3ng h\u1ed3 nguy\u00ean t\u1eed l\u00e0 th\u1ee9 c\u1ef1c k\u1ef3 ch\u00ednh x\u00e1c, d\u1ef1a tr\u00ean s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a c\u00e1c h\u1ea1t nguy\u00ean t\u1eed. Khi c\u00e1c \u0111\u1ed3ng h\u1ed3 n\u00e0y k\u1ebft h\u1ee3p, ch\u00fang t\u1ea1o ra m\u1ed9t ti\u00eau chu\u1ea9n th\u1eddi gian ch\u00ednh x\u00e1c \u0111\u1ebfn m\u1ee9c kh\u00f3 tin.<\/p>\n

\"gio-utc-2\"<\/picture><\/p>\n

Ti\u1ebfp theo l\u00e0 Gi\u1edd qu\u1ed1c t\u1ebf (UT1). UT1 li\u00ean quan \u0111\u1ebfn v\u00f2ng quay c\u1ee7a Tr\u00e1i \u0110\u1ea5t. N\u00f3 ph\u1ea3n \u00e1nh th\u1eddi gian m\u00e0 Tr\u00e1i \u0110\u1ea5t m\u1ea5t \u0111\u1ec3 quay m\u1ed9t v\u00f2ng quanh tr\u1ee5c c\u1ee7a m\u00ecnh. UT1 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 theo d\u00f5i s\u1ef1 thay \u0111\u1ed5i nh\u1ecf trong t\u1ed1c \u0111\u1ed9 quay c\u1ee7a Tr\u00e1i \u0110\u1ea5t, \u0111i\u1ec1u n\u00e0y c\u1ea7n thi\u1ebft cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng nh\u01b0 \u0111\u1ecbnh v\u1ecb v\u1ec7 tinh v\u00e0 d\u1ef1 b\u00e1o th\u1eddi ti\u1ebft.<\/p>\n

Khi k\u1ebft h\u1ee3p hai th\u00e0nh ph\u1ea7n n\u00e0y, UTC \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng ho\u00e0n h\u1ea3o. N\u00f3 l\u1ea5y \u0111\u1ed9 ch\u00ednh x\u00e1c t\u1eeb TAI v\u00e0 \u0111i\u1ec1u ch\u1ec9nh n\u00f3 d\u1ef1a tr\u00ean d\u1eef li\u1ec7u t\u1eeb UT1. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng UTC kh\u00f4ng ch\u1ec9 ch\u00ednh x\u00e1c m\u00e0 c\u00f2n ph\u1ea3n \u00e1nh s\u1ef1 thay \u0111\u1ed5i t\u1ef1 nhi\u00ean c\u1ee7a Tr\u00e1i \u0110\u1ea5t.<\/p>\n

M\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng ch\u00ednh c\u1ee7a gi\u1edd UTC<\/h2>\n

\u0110\u1ea7u ti\u00ean, UTC gi\u00fap \u0111\u1ed3ng b\u1ed9 h\u00f3a th\u1eddi gian trong giao ti\u1ebfp qu\u1ed1c t\u1ebf. Trong th\u1ebf gi\u1edbi k\u1ebft n\u1ed1i ch\u1eb7t ch\u1ebd nh\u01b0 hi\u1ec7n nay, vi\u1ec7c c\u00f3 m\u1ed9t ti\u00eau chu\u1ea9n th\u1eddi gian chung l\u00e0 c\u1ea7n thi\u1ebft. UTC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u00e0ng kh\u00f4ng, v\u1eadn t\u1ea3i bi\u1ec3n, v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin li\u00ean l\u1ea1c to\u00e0n c\u1ea7u, gi\u00fap c\u00e1c ho\u1ea1t \u0111\u1ed9ng n\u00e0y di\u1ec5n ra m\u01b0\u1ee3t m\u00e0 v\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 nh\u1ea7m l\u1eabn v\u1ec1 th\u1eddi gian.<\/p>\n

Th\u00eam v\u00e0o \u0111\u00f3, UTC c\u0169ng l\u00e0 ti\u00eau chu\u1ea9n trong l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 th\u00f4ng tin. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c chu\u1ea9n Internet v\u00e0 World Wide Web, \u0111\u1eb7c bi\u1ec7t l\u00e0 Giao th\u1ee9c \u0111\u1ed3ng b\u1ed9 th\u1eddi gian m\u1ea1ng (NTP). NTP gi\u00fap \u0111\u1ed3ng b\u1ed9 th\u1eddi gian cho c\u00e1c m\u00e1y t\u00ednh s\u1eed d\u1ee5ng Internet, \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed3ng b\u1ed9.<\/p>\n

\"gio-utc-3\"<\/picture><\/p>\n

Trong ng\u00e0nh h\u00e0ng kh\u00f4ng, gi\u1edd UTC<\/strong> gi\u00fap \u0111\u1ea3m b\u1ea3o c\u00e1c chuy\u1ebfn bay di\u1ec5n ra su\u00f4n s\u1ebb khi di chuy\u1ec3n qua c\u00e1c m\u00fai gi\u1edd kh\u00e1c nhau. N\u00f3 c\u0169ng quan tr\u1ecdng trong vi\u1ec7c d\u1ef1 b\u00e1o th\u1eddi ti\u1ebft v\u00e0 l\u1eadp b\u1ea3n \u0111\u1ed3, t\u1eeb \u0111\u00f3 gi\u00fap tr\u00e1nh nh\u1ea7m l\u1eabn v\u1ec1 m\u00fai gi\u1edd v\u00e0 th\u1eddi gian ti\u1ebft ki\u1ec7m \u00e1nh s\u00e1ng ban ng\u00e0y.<\/p>\n

\u0110\u00e1ng ch\u00fa \u00fd, Tr\u1ea1m V\u0169 tr\u1ee5 Qu\u1ed1c t\u1ebf c\u0169ng s\u1eed d\u1ee5ng UTC l\u00e0m ti\u00eau chu\u1ea9n th\u1eddi gian. \u0110i\u1ec1u n\u00e0y gi\u00fap duy tr\u00ec s\u1ef1 nh\u1ea5t qu\u00e1n v\u00e0 ch\u00ednh x\u00e1c trong c\u00e1c ho\u1ea1t \u0111\u1ed9ng v\u00e0 nghi\u00ean c\u1ee9u v\u0169 tr\u1ee5. C\u1ea3 trong ng\u00e0nh v\u1eadn t\u1ea3i h\u00e0ng h\u00f3a, UTC c\u0169ng r\u1ea5t quan tr\u1ecdng. C\u00e1c ph\u01b0\u01a1ng ti\u1ec7n v\u1eadn chuy\u1ec3n h\u00e0ng h\u00f3a l\u1edbn (LGV) s\u1eed d\u1ee5ng UTC trong m\u00e1y \u0111o t\u1ed1c \u0111\u1ed9 k\u1ef9 thu\u1eadt s\u1ed1 theo quy \u0111\u1ecbnh c\u1ee7a Li\u00ean minh Ch\u00e2u \u00c2u v\u00e0 AETR.<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u00fai gi\u1edd UTC v\u00e0 GMT<\/h2>\n

V\u1ec1 c\u01a1 b\u1ea3n, gi\u1edd UTC<\/strong> v\u00e0 gi\u1edd GMT, d\u00f9 c\u00f3 ngu\u1ed3n g\u1ed1c v\u00e0 m\u1ee5c \u0111\u00edch t\u01b0\u01a1ng t\u1ef1, nh\u01b0ng l\u1ea1i c\u00f3 nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t quan tr\u1ecdng. H\u00e3y c\u00f9ng so s\u00e1nh hai chu\u1ea9n th\u1eddi gian n\u00e0y.<\/p>\n

UTC hay Th\u1eddi gian Ph\u1ed1i h\u1ee3p Qu\u1ed1c t\u1ebf l\u00e0 ti\u00eau chu\u1ea9n th\u1eddi gian hi\u1ec7n \u0111\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng to\u00e0n c\u1ea7u. N\u00f3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean th\u1eddi gian c\u1ee7a \u0111\u1ed3ng h\u1ed3 nguy\u00ean t\u1eed, v\u1edbi \u0111\u1ecbnh ngh\u0129a ch\u00ednh x\u00e1c c\u1ee7a gi\u00e2y. \u0110i\u1ec1u n\u00e0y l\u00e0m cho UTC tr\u1edf th\u00e0nh chu\u1ea9n th\u1eddi gian ch\u00ednh x\u00e1c v\u00e0 \u1ed5n \u0111\u1ecbnh, kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a Tr\u00e1i \u0110\u1ea5t. Tuy nhi\u00ean, UTC kh\u00f4ng ph\u1ea3i l\u00e0 gi\u1edd \u0111\u1ecba ph\u01b0\u01a1ng ch\u00ednh th\u1ee9c \u1edf b\u1ea5t k\u1ef3 qu\u1ed1c gia hay l\u00e3nh th\u1ed5 n\u00e0o.<\/p>\n

\"gio-utc-4\"<\/picture><\/p>\n

Ng\u01b0\u1ee3c l\u1ea1i, GMT hay Gi\u1edd Trung B\u00ecnh Greenwich l\u00e0 ti\u00eau chu\u1ea9n th\u1eddi gian c\u0169 h\u01a1n. GMT d\u1ef1a tr\u00ean v\u00f2ng quay c\u1ee7a Tr\u00e1i \u0110\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t chu\u1ea9n m\u00fai gi\u1edd t\u1ea1i m\u1ed9t s\u1ed1 qu\u1ed1c gia \u1edf ch\u00e2u \u00c2u v\u00e0 ch\u00e2u Phi. Th\u1eddi gian GMT th\u01b0\u1eddng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb theo c\u1ea3 hai \u0111\u1ecbnh d\u1ea1ng 12 gi\u1edd v\u00e0 24 gi\u1edd. GMT quen thu\u1ed9c h\u01a1n v\u1edbi nhi\u1ec1u ng\u01b0\u1eddi trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y, v\u00e0 v\u1eabn c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i.<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa UTC v\u00e0 GMT n\u1eb1m \u1edf c\u00e1ch th\u1ee9c x\u00e1c \u0111\u1ecbnh th\u1eddi gian: UTC s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i v\u1edbi \u0111\u1ed3ng h\u1ed3 nguy\u00ean t\u1eed, trong khi GMT d\u1ef1a tr\u00ean quan s\u00e1t chuy\u1ec3n \u0111\u1ed9ng t\u1ef1 nhi\u00ean c\u1ee7a Tr\u00e1i \u0110\u1ea5t. Nh\u01b0 v\u1eady, UTC \u0111\u1ea1i di\u1ec7n cho s\u1ef1 ch\u00ednh x\u00e1c v\u00e0 \u1ed5n \u0111\u1ecbnh khoa h\u1ecdc, c\u00f2n GMT g\u1eafn li\u1ec1n v\u1edbi l\u1ecbch s\u1eed v\u00e0 truy\u1ec1n th\u1ed1ng.<\/p>\n

H\u01b0\u1edbng d\u1eabn ca\u0301ch chuy\u1ec3n \u0111\u00f4\u0309i gi\u01a1\u0300 UTC sang gi\u01a1\u0300 Vi\u00ea\u0323t Nam nhanh ch\u00f3ng<\/h2>\n

\u0110\u1ed5i gi\u1edd t\u1eeb UTC sang gi\u1edd Vi\u1ec7t Nam l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh \u0111\u01a1n gi\u1ea3n v\u00e0 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi nh\u1eefng ai l\u00e0m vi\u1ec7c ho\u1eb7c giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi \u1edf c\u00e1c qu\u1ed1c gia kh\u00e1c. Vi\u1ec7t Nam n\u1eb1m trong m\u00fai gi\u1edd UTC+7, c\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn nh\u01b0 m\u00fai gi\u1edd \u0110\u00f4ng D\u01b0\u01a1ng (Indochina Time \u2013 ICT). M\u00fai gi\u1edd n\u00e0y kh\u00f4ng ch\u1ec9 d\u00f9ng \u1edf Vi\u1ec7t Nam m\u00e0 c\u00f2n \u1edf L\u00e0o, Th\u00e1i Lan, Campuchia v\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a Indonesia.<\/p>\n

\"gio-utc-5\"<\/picture><\/p>\n

\u0110\u1ec3 \u0111\u1ed5i gi\u1edd t\u1eeb UTC sang gi\u1edd Vi\u1ec7t Nam, b\u1ea1n ch\u1ec9 c\u1ea7n th\u00eam 7 gi\u1edd<\/strong> v\u00e0o th\u1eddi gian UTC. Qu\u00e1 tr\u00ecnh n\u00e0y r\u1ea5t thu\u1eadn ti\u1ec7n v\u00e0 d\u1ec5 d\u00e0ng. Tr\u00ean c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed hay \u1ee9ng d\u1ee5ng qu\u1ea3n l\u00fd th\u1eddi gian, m\u00fai gi\u1edd n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c ghi nh\u1eadn v\u1edbi c\u00e1c t\u00ean g\u1ecdi c\u1ee7a th\u1ee7 \u0111\u00f4 nh\u01b0 Bangkok, Hanoi, Jakarta.<\/p>\n

Ch\u1eb3ng h\u1ea1n, n\u1ebfu th\u1eddi gian theo gi\u1edd UTC<\/strong> l\u00e0 02:00, th\u00ec t\u1ea1i Vi\u1ec7t Nam, th\u1eddi gian \u0111\u00f3 s\u1ebd l\u00e0 09:00. S\u1ef1 ch\u00eanh l\u1ec7ch 7 gi\u1edd n\u00e0y gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng chuy\u1ec3n \u0111\u1ed5i th\u1eddi gian khi l\u00e0m vi\u1ec7c v\u1edbi \u0111\u1ed1i t\u00e1c qu\u1ed1c t\u1ebf, l\u00ean l\u1ecbch cho c\u00e1c cu\u1ed9c h\u1ecdp tr\u1ef1c tuy\u1ebfn, hay th\u1eadm ch\u00ed l\u00e0 khi b\u1ea1n du l\u1ecbch ho\u1eb7c giao ti\u1ebfp v\u1edbi ng\u01b0\u1eddi th\u00e2n \u1edf n\u01b0\u1edbc ngo\u00e0i.<\/p>\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

Sau khi t\u00ecm hi\u1ec3u v\u1ec1 UTC, ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 r\u00f5 h\u01a1n v\u1ec1 m\u00fai gi\u1edd n\u00e0y th\u00f4ng qua nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi b\u00ean d\u01b0\u1edbi nh\u00e9.<\/p>\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft m\u00fai gi\u1edd UTC hi\u1ec7n t\u1ea1i c\u1ee7a m\u1ed9t \u0111\u1ecba \u0111i\u1ec3m?<\/h3>\n

\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh th\u1eddi gian UTC hi\u1ec7n t\u1ea1i c\u1ee7a m\u1ed9t \u0111\u1ecba \u0111i\u1ec3m c\u1ee5 th\u1ec3, b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m theo c\u00e1c c\u00e1ch sau:<\/p>\n