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Waktu Greenwich (baca: pengucapan ⓘ; pengucapan bahasa Inggris: [ˈɡrɛnɪtʃ] GREN-itch, /ˈɡrɛnɪdʒ/ GREN-idge, /ˈɡrɪnɪdʒ/ GRIN-idge) atau Greenwich Mean Time atau GMT adalah rata-rata waktu surya seperti yang dilihat dari Royal Greenwich Observatory (Observatorium Kerajaan di Greenwich), yang terletak di Greenwich, London, Inggris ...
Ingat, sejumlah lokasi menggunakan GMT (Greenwich Mean Time) daripada UTC (Coordinated Universal Time) dalam definisi waktu lokal. Beberapa zona utara & selatan di tengah Pasifik berbeda 24 jam: mereka memiliki waktu yang sama tetapi berbeda dalam hari.
Waktu universal (bahasa indonesia Universal Time, disingkat UT) adalah satu ukuran waktu yang didasari oleh rotasi bumi. Satuan ini adalah kelanjutan modern dari GMT (Greenwich Mean Time), yaitu, mean waktu matahari di meridian di Greenwich, Inggris, yang secara lazim dianggap sebagai bujur geografis 0 derajat.
Ten years later, on 22 February 1918, time in Padang, Sumatra was set at 39 minutes ahead of Central Java, while time in Palembang was set at 8 hours and 20 minutes ahead of Greenwich Mean Time. Then, on 1 January 1924, times for various locations were set as follows:
Mar 9, 2024 · The mean solar time (i.e., the average time when the sun crosses the meridian) at the Greenwich observatory was defined as Greenwich Mean Time (GMT) from 1884 to 1972, when it was replaced by Coordinated Universal Time (UTC) as an international time standard.
Coordinated Universal Time or UTC is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and ...
