PI-lutarch e-Isis nase-Osiris ilandisa ukuthi lo nkulunkulu wokugcina wazalwa ngosuku lokuqala kwezinsuku ezinhlanu zokugcwala, njengoba kubhalwe nguMoret, okungukuthi ngosuku lwama-361 lonyaka oluhambelana nokunikezwa kwenguquko ekhalendeni kuze kube nguDisemba 26. UPapa Julius I (Ikhulu lesi-25) wamisa ukuzalwa kukaKristu ngoDisemba XNUMX; kepha siyazi ukuthi uKristu wayengenaso Isimo Somphakathi nokuthi akekho owazi usuku lwakhe lokuzalwa. Yini engakhuthaza uPapa Julius I ngokukhetha lolu suku, olusondele kulolo lokuzalwa kuka-Osiris uma kungesilo isiko laseGibhithe elenziwa yikhalenda lamaRoma?
Lokhu kuba sobala lapho sihlobanisa umqondo wesihlahla nokuzalwa kukaKristu: konke lokhu bekungaba ngokugqamile uma singazi ukuthi u-Osiris futhi wayengunkulunkulu wezimila: kwesinye isikhathi wayependwa oluhlaza ngomfanekiso walolu hlaza olufanekisela ukuzalwa kabusha kwalo. Uphawu lwayo ngumuthi onamagatsha asikiwe, owakhiwa ukumemezela ukuvuka kwempilo yezitshalo. Ngakho-ke bekunomkhosi ophawuleka kakhulu wezolimo obonakala emphakathini ohleli phansi.