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Astronomy · L1 · Why a Year Has 365 Days · flowchart

Astronomy
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Earth orbits the Sun inabout 365 and a quarter daysCalendar counts a'normal' year as 365 daysAbout a quarter dayis left over each yearAfter 4 years, the leftoveradds up to about one full dayThat extra day becomesFebruary 29 — a leap year
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