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It depends on what you mean by "year". A non-leap calendar year (365 days) is 8760 hours, and a leap year (366 days) is 8784 hours. A Julian year (365.25 days) is 8766 hours. A solar year or vernal equinox year (365.2424 days) is 8765.8176 hours (8765 h 49 min 3.36 s). A Gregorian year (365.2425 days) is 8765.82 hours (8765 h 49 min 12 s). The sidereal year used by astronomers is 365.256363051 days (8766 h 9 min 9.7676 s).

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16y ago

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