{"id":297364,"date":"2023-12-18T20:00:59","date_gmt":"2023-12-18T13:00:59","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=297364"},"modified":"2026-02-07T20:24:11","modified_gmt":"2026-02-07T13:24:11","slug":"gio-viet-nam","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/gio-viet-nam\/","title":{"rendered":"Gi\u1edd Vi\u1ec7t Nam hi\u1ec7n t\u1ea1i thu\u1ed9c m\u00fai gi\u1edd UTC+7 (ICT) – Xem th\u1eddi gian ch\u00ednh x\u00e1c ngay b\u00e2y gi\u1edd"},"content":{"rendered":"

B\u1ea1n \u0111\u00e3 bao gi\u1edd t\u1ef1 h\u1ecfi v\u00ec sao khi ch\u00fang ta \u0111ang chu\u1ea9n b\u1ecb \u0111i ng\u1ee7 th\u00ec ng\u01b0\u1eddi th\u00e2n \u1edf M\u1ef9 l\u1ea1i v\u1eeba m\u1edbi th\u1ee9c d\u1eady ch\u01b0a? Hay \u0111\u01a1n gi\u1ea3n h\u01a1n, b\u1ea1n mu\u1ed1n bi\u1ebft ch\u00ednh x\u00e1c\u00a0gi\u1edd Vi\u1ec7t Nam<\/strong>\u00a0thu\u1ed9c m\u00fai gi\u1edd th\u1ee9 m\u1ea5y \u0111\u1ec3 ti\u1ec7n s\u1eafp x\u1ebfp c\u00f4ng vi\u1ec7c v\u1edbi c\u00e1c \u0111\u1ed1i t\u00e1c n\u01b0\u1edbc ngo\u00e0i? Vi\u1ec7c n\u1eafm r\u00f5 quy lu\u1eadt th\u1eddi gian kh\u00f4ng ch\u1ec9 gi\u00fap b\u1ea1n l\u00e0m ch\u1ee7 l\u1ecbch tr\u00ecnh m\u00e0 c\u00f2n l\u00e0 m\u1ed9t ki\u1ebfn th\u1ee9c \u0111\u1ecba l\u00fd c\u1ef1c k\u1ef3 th\u00fa v\u1ecb trong cu\u1ed9c s\u1ed1ng hi\u1ec7n \u0111\u1ea1i. Trong b\u00e0i vi\u1ebft n\u00e0y, \u0111\u1ed9i ng\u0169 n\u1ed9i dung s\u1ebd c\u00f9ng b\u1ea1n kh\u00e1m ph\u00e1 t\u1ea5t t\u1ea7n t\u1eadt v\u1ec1 m\u00fai gi\u1edd c\u1ee7a n\u01b0\u1edbc ta, c\u00e1ch t\u00ednh to\u00e1n ch\u00eanh l\u1ec7ch gi\u1edd gi\u1ea5c to\u00e0n c\u1ea7u v\u00e0 nh\u1eefng s\u1ef1 th\u1eadt “l\u1ea1 l\u00f9ng” v\u1ec1 th\u1eddi gian tr\u00ean Tr\u00e1i \u0110\u1ea5t m\u00e0 c\u00f3 th\u1ec3 b\u1ea1n ch\u01b0a t\u1eebng nghe t\u1edbi.<\/p>\n

M\u00fai gi\u1edd l\u00e0 g\u00ec? Tr\u00e1i \u0111\u1ea5t hi\u1ec7n t\u1ea1i c\u00f3 bao nhi\u00eau m\u00fai gi\u1edd ch\u00ednh th\u1ee9c?<\/h2>\n

Tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o c\u00e2u h\u1ecfi Vi\u1ec7t Nam thu\u1ed9c m\u00fai gi\u1edd th\u1ee9 m\u1ea5y, b\u1ea1n c\u1ea7n hi\u1ec3u r\u00f5 kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u1ec1 m\u00fai gi\u1edd. Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t, m\u00fai gi\u1edd (hay c\u00f2n g\u1ecdi l\u00e0 gi\u1edd \u0111\u1ecba ph\u01b0\u01a1ng) l\u00e0 m\u1ed9t v\u00f9ng tr\u00ean Tr\u00e1i \u0110\u1ea5t m\u00e0 ng\u01b0\u1eddi d\u00e2n \u1edf \u0111\u00f3 quy \u01b0\u1edbc s\u1eed d\u1ee5ng chung m\u1ed9t th\u1eddi gian ti\u00eau chu\u1ea9n. \u00dd t\u01b0\u1edfng n\u00e0y ra \u0111\u1eddi \u0111\u1ec3 gi\u00fap con ng\u01b0\u1eddi d\u1ec5 d\u00e0ng qu\u1ea3n l\u00fd th\u1eddi gian sinh ho\u1ea1t theo v\u1ecb tr\u00ed c\u1ee7a m\u1eb7t tr\u1eddi t\u1ea1i khu v\u1ef1c h\u1ecd sinh s\u1ed1ng.<\/p>\n

\"gio-viet-nam-1\"<\/picture><\/p>\n

Kh\u00e1i ni\u1ec7m m\u00fai gi\u1edd l\u00e0 g\u00ec?<\/h3>\n

M\u00fai gi\u1edd l\u00e0 nh\u1eefng khu v\u1ef1c \u0111\u1ecba l\u00fd m\u00e0 m\u1ecdi ng\u01b0\u1eddi ch\u1ea5p nh\u1eadn tu\u00e2n th\u1ee7 theo m\u1ed9t m\u1ed1c gi\u1edd c\u1ed1 \u0111\u1ecbnh. B\u1ea1n c\u00f3 th\u1ec3 t\u01b0\u1edfng t\u01b0\u1ee3ng r\u1eb1ng n\u1ebfu kh\u00f4ng c\u00f3 m\u00fai gi\u1edd, m\u1ed7i th\u00e0nh ph\u1ed1 s\u1ebd c\u00f3 m\u1ed9t gi\u1edd ri\u00eang d\u1ef1a theo v\u1ecb tr\u00ed m\u1eb7t tr\u1eddi \u0111\u1ee9ng b\u00f3ng, \u0111i\u1ec1u n\u00e0y s\u1ebd g\u00e2y ra s\u1ef1 h\u1ed7n lo\u1ea1n kh\u1ee7ng khi\u1ebfp cho ng\u00e0nh \u0111\u01b0\u1eddng s\u1eaft hay h\u00e0ng kh\u00f4ng. Khi c\u00e1c qu\u1ed1c gia n\u1eb1m trong c\u00f9ng m\u1ed9t d\u1ea3i m\u00fai gi\u1edd, th\u1eddi gian t\u1ea1i b\u1ea5t k\u1ef3 th\u1eddi \u0111i\u1ec3m n\u00e0o trong ng\u00e0y c\u1ee7a h\u1ecd c\u0169ng s\u1ebd gi\u1ed1ng h\u1ec7t nhau, b\u1ea5t k\u1ec3 kho\u1ea3ng c\u00e1ch \u0111\u1ecba l\u00fd xa hay g\u1ea7n trong ph\u1ea1m vi d\u1ea3i \u0111\u00f3.<\/p>\n

C\u00e1ch ph\u00e2n chia c\u00e1c m\u00fai gi\u1edd tr\u00ean th\u1ebf gi\u1edbi hi\u1ec7n nay<\/h3>\n

Tr\u00e1i \u0110\u1ea5t c\u1ee7a ch\u00fang ta c\u00f3 h\u00ecnh c\u1ea7u v\u00e0 t\u1ef1 quay quanh tr\u1ee5c c\u1ee7a n\u00f3. T\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m nh\u1ea5t \u0111\u1ecbnh, m\u1ed9t n\u1eeda c\u1ea7u s\u1ebd l\u00e0 bu\u1ed5i s\u00e1ng v\u00ec \u0111\u01b0\u1ee3c m\u1eb7t tr\u1eddi chi\u1ebfu s\u00e1ng, trong khi n\u1eeda c\u00f2n l\u1ea1i ch\u00ecm trong b\u00f3ng t\u1ed1i c\u1ee7a bu\u1ed5i \u0111\u00eam. \u0110\u1ec3 \u0111\u1ed3ng b\u1ed9 h\u00f3a th\u1eddi gian to\u00e0n c\u1ea7u, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 chia b\u1ec1 m\u1eb7t Tr\u00e1i \u0110\u1ea5t th\u00e0nh 24 \u0111\u01b0\u1eddng kinh tuy\u1ebfn t\u01b0\u01a1ng \u1ee9ng v\u1edbi 24 m\u00fai gi\u1edd. M\u1ed7i m\u00fai gi\u1edd n\u00e0y s\u1ebd c\u00e1ch nhau \u0111\u00fang 1 gi\u1edd \u0111\u1ed3ng h\u1ed3, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi kho\u1ea3ng 15 \u0111\u1ed9 kinh tuy\u1ebfn.<\/p>\n

\"gio-viet-nam-2\"<\/picture><\/p>\n

Theo quy \u01b0\u1edbc qu\u1ed1c t\u1ebf, kinh tuy\u1ebfn s\u1ed1 0 l\u00e0 \u0111\u01b0\u1eddng ch\u1ea1y ngang qua \u0110\u00e0i thi\u00ean v\u0103n Ho\u00e0ng gia Anh t\u1ea1i Greenwich, Lu\u00e2n \u0110\u00f4n. M\u00fai gi\u1edd t\u1ea1i \u0111\u00e2y \u0111\u01b0\u1ee3c ch\u1ecdn l\u00e0m \u0111i\u1ec3m g\u1ed1c, g\u1ecdi l\u00e0 m\u00fai gi\u1edd s\u1ed1 0. Tr\u01b0\u1edbc \u0111\u00e2y, ng\u01b0\u1eddi ta th\u01b0\u1eddng d\u00f9ng k\u00fd hi\u1ec7u GMT (Greenwich Mean Time) \u0111\u1ec3 ch\u1ec9 m\u00fai gi\u1edd. Tuy nhi\u00ean, t\u1eeb n\u0103m 1980, m\u1ed9t ti\u00eau chu\u1ea9n ch\u00ednh x\u00e1c h\u01a1n l\u00e0 UTC (Universal Time Coordinated – Gi\u1edd ph\u1ed1i h\u1ee3p qu\u1ed1c t\u1ebf) \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng \u0111\u1ec3 thay th\u1ebf. D\u00f9 v\u1eady, trong giao ti\u1ebfp th\u00f4ng th\u01b0\u1eddng, b\u1ea1n v\u1eabn s\u1ebd th\u1ea5y m\u1ecdi ng\u01b0\u1eddi d\u00f9ng c\u1ee5m t\u1eeb GMT v\u00ec n\u00f3 \u0111\u00e3 qu\u00e1 quen thu\u1ed9c su\u1ed1t h\u00e0ng th\u1ebf k\u1ef7 qua.<\/p>\n

M\u00fai gi\u1edd Vi\u1ec7t Nam ch\u00ednh x\u00e1c l\u00e0 bao nhi\u00eau?<\/h2>\n

C\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c nh\u1ea5t d\u00e0nh cho b\u1ea1n:\u00a0Vi\u1ec7t Nam thu\u1ed9c m\u00fai gi\u1edd th\u1ee9 7<\/strong>. Tr\u00ean c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed ho\u1eb7c b\u1ea3n \u0111\u1ed3 th\u1ebf gi\u1edbi, m\u00fai gi\u1edd c\u1ee7a n\u01b0\u1edbc ta th\u01b0\u1eddng \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0\u00a0GMT +7<\/strong>\u00a0ho\u1eb7c\u00a0UTC +7<\/strong>. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 th\u1eddi gian t\u1ea1i Vi\u1ec7t Nam s\u1ebd nhanh h\u01a1n 7 ti\u1ebfng so v\u1edbi gi\u1edd qu\u1ed1c t\u1ebf t\u1ea1i Anh.<\/p>\n

B\u1ea1n c\u00f3 th\u1ec3 l\u00e0m m\u1ed9t ph\u00e9p t\u00ednh \u0111\u01a1n gi\u1ea3n: N\u1ebfu t\u1ea1i Lu\u00e2n \u0110\u00f4n (m\u00fai gi\u1edd 0) \u0111ang l\u00e0 1 gi\u1edd s\u00e1ng, th\u00ec t\u1ea1i Vi\u1ec7t Nam ch\u00fang ta \u0111\u00e3 l\u00e0 8 gi\u1edd s\u00e1ng c\u00f9ng ng\u00e0y. Vi\u1ec7c n\u1eb1m \u1edf kinh tuy\u1ebfn s\u1ed1 7 gi\u00fap Vi\u1ec7t Nam \u0111\u00f3n \u00e1nh n\u1eafng m\u1eb7t tr\u1eddi kh\u00e1 s\u1edbm so v\u1edbi c\u00e1c n\u01b0\u1edbc ph\u01b0\u01a1ng T\u00e2y. To\u00e0n b\u1ed9 l\u00e3nh th\u1ed5 n\u01b0\u1edbc ta t\u1eeb L\u0169ng C\u00fa (H\u00e0 Giang) \u0111\u1ebfn \u0110\u1ea5t M\u0169i (C\u00e0 Mau) \u0111\u1ec1u \u00e1p d\u1ee5ng chung m\u1ed9t m\u00fai gi\u1edd n\u00e0y, gi\u00fap vi\u1ec7c qu\u1ea3n l\u00fd nh\u00e0 n\u01b0\u1edbc v\u00e0 giao th\u01b0\u01a1ng n\u1ed9i \u0111\u1ecba tr\u1edf n\u00ean c\u1ef1c k\u1ef3 thu\u1eadn ti\u1ec7n.<\/p>\n

\"gio-viet-nam-3\"<\/picture><\/p>\n

Trong khu v\u1ef1c \u0110\u00f4ng Nam \u00c1 (ASEAN), c\u00e1c qu\u1ed1c gia l\u00e1ng gi\u1ec1ng c\u00f3 s\u1ef1 ph\u00e2n b\u1ed5 m\u00fai gi\u1edd kh\u00e1 \u0111a d\u1ea1ng nh\u01b0 sau:<\/p>\n