Earth saw almost equal day and night on September 23
September 23 marked the beginning of the autumn season in the Northern Hemisphere, referred as 'Autumn Equinox', with 'equinox' being Latin for 'equal night'. An equinox occurs twice a year when the Sun is directly over Earth's equator, resulting in both day and night time to be roughly 12 hours each. Notably, the Spring Equinox was on March 21.