A cikin ilmin taurari, shekara ta Julian (alama: a) ita ce ma'aunin ma'aunin lokaci wanda aka ayyana daidai da kwanaki 365.25 na 86400 SI seconds kowane. Tsawon shekara ta Julian shine matsakaicin tsawon shekara a cikin kalandar Julian wanda aka yi amfani da shi a cikin al'ummomin Yammacin Turai har zuwa wasu ƙarni da suka gabata, kuma daga abin da aka sanya sunan naúrar. Duk da haka, saboda shekarun Julian na astronomical suna auna tsawon lokaci maimakon sanya kwanan wata, wannan shekarar Julian ba ta dace da shekaru a cikin kalandar Julian ko wani kalandar ba. Kuma bai dace da sauran hanyoyin da yawa na ayyana shekara ba. Tambaya: Shekaru na Julian suna auna menene?
tsawon lokaci