+**366** is a natural number following 365 and preceding 367. It notably represents the number of days in a [Leap year](/wiki/Leap_year), featuring an extra [Day](/wiki/Day) compared to a common year. This periodic adjustment keeps the calendar aligned with Earth's orbit.
+## See also
+- [Leap year](/wiki/Leap_year)
+- [Calendar](/wiki/Calendar)
+- [Year](/wiki/Year)
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