Eli5: How did people know how long a year was in olden times? Submitted by Slokkkk t3_11dm4k6 on February 27, 2023 at 8:36 PM in explainlikeimfive 88 comments 141
specialsymbol t1_jabglf3 wrote on February 28, 2023 at 5:39 AM They would poke a stick in the ground and trace the shadow at noon. When the shadow reaches a point that was already marked a year has passed. Permalink 1
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