#AlBattānī's (📆 858 – 929) #astronomical 🌌 table is the earliest extant. His value for the #solar year of 365 days, 5 hours, 46 minutes and 24 seconds, is 2 minutes and 22 seconds ⏱️ from the accepted value. https://en.wikipedia.org/wiki/Al-Battani#Astronomy

Picture : https://commons.wikimedia.org/wiki/File:Latin_7266;_folio_78r_(BnF).jpg