Editing Year (section)

== Calendar year ==
A [[calendar year]] is an approximation of the number of days of the Earth's orbital period, as counted in a given [[calendar]]. The [[Gregorian calendar]], or modern calendar, presents its calendar year to be either a [[common year]] of 365 days or a [[leap year]] of 366 days, as do the [[Julian calendar]]s. For the Gregorian calendar, the average length of the calendar year (the mean year) across the complete leap cycle of 400 years is 365.2425 days (97 out of 400 years are leap years).<ref>{{cite web |url=https://www.grc.nasa.gov/www/k-12/Numbers/Math/Mathematical_Thinking/calendar_calculations.htm |title= Calendar Calculations |author=<!--Not stated--> |date= |website=Glenn Learning Technologies Project  |publisher=National Aeronautics Space Administration |access-date=November 11, 2023 |quote=}}</ref>