KnowraSolar yearLinked fromLinked fromThe 9 pages that link to Solar year, each with the reason it gives.All 9Related 4Narrower topic 2Compared with 3Gregorian calendarRelated: The calendar’s average year approximates this seasonal cycle.Lunar calendarCompared with: Its greater length explains why an unadjusted lunar calendar shifts through the seasons.IntercalationNarrower topic: Its length is the seasonal cycle that solar calendars must track.Persian calendarNarrower topic: The calendar approximates this seasonal cycle rather than following lunar phases.Islamic New YearCompared with: The shorter lunar year makes Muharram move earlier through solar seasons.Zu ChongzhiRelated: Estimating the year’s length was essential to the accuracy of Zu Chongzhi’s calendar.Guo ShoujingRelated: Accurate measurement of the solar year was essential to the Shoushi calendar’s seasonal alignment.OctoberRelated: The Gregorian calendar’s month lengths, including October’s, approximate this cycle.Hijri eraCompared with: Its length exceeds a Hijri lunar year, causing dates to drift across seasons.