Equinox

===Cultural aspects===
{{Main|March equinox#Culture|September equinox#Culture}}
The equinoxes are sometimes regarded as the start of spring and autumn. A number of traditional [[harvest festival]]s  are celebrated on the date of the equinoxes.

People in countries including Iran, Afghanistan, Tajikistan celebrate [[Nowruz]] which is spring equinox in northern hemisphere.  This day marks the new year in [[Solar Hijri calendar]]. 

Religious architecture is often determined by the equinox; the [[Angkor Wat Equinox]] during which the sun rises in a perfect alignment over [[Angkor Wat]] in [[Cambodia]] is one such example.<ref>{{Cite book |last=DiBiasio |first=Jame |url=https://books.google.com/books?id=fg4LBAAAQBAJ&dq=angkor+equinox&pg=PT37 |title=The Story of Angkor |date=2013-07-15 |publisher=Silkworm Books |isbn=978-1-63102-259-3 |language=en}}</ref>

[[Catholic churches]], since the recommendations of [[Charles Borromeo]], have often chosen the equinox as their reference point for the [[orientation of churches]].<ref>{{Cite book |last=Johnson |first=Walter |url=https://books.google.com/books?id=MZQeHSDPe0MC&dq=equinox+as+their+reference+point+for+the+orientation+of+churches.&pg=PA229 |title=Byways in British Archaeology |date=2011-11-18 |publisher=Cambridge University Press |isbn=978-0-521-22877-0 |language=en}}</ref>