Akhristu a Orthodox padziko lonse lapansi amakondwerera masiku ano Kubadwa kwa Yesu - Akhristu a Orthodox, limodzi mwatchuthi chofunikira kwambiri cha Orthodox.
Khirisimasi ya Orthodox imakondwerera pa Januware 7 Russian, matchalitchi a Georgian, Jerusalemite, Polish ndi Serbian Orthodox, nyumba za amonke za Athos ku Greece, komanso Eastern Catholic Church ndi Old Believers. Matchalitchi a Roma Katolika, Achipulotesitanti ndi khumi a Orthodox (kuphatikiza Mpingo wa Antiokeya, Tchalitchi cha Alexandria, Tchalitchi cha Kupro, Tchalitchi cha Bulgarian, ndi matchalitchi ena) amalemba tsiku loyambirira, pa December 25. makalendala: Julian kapena Gregorian.
M'zaka za m'ma 2-4, Kubadwa kwa Khristu kunakondwerera tsiku lomwelo la Ubatizo wa Ambuye pansi pa dzina limodzi la Epiphany - January 6, malinga ndi kalendala ya Julian (kalembedwe kakale). Chakumapeto kwa zaka za m’ma 4, Khirisimasi ndi Epiphany m’matchalitchi a Azungu zinalekana. Kubadwa kwa Khristu kunayamba kukondwerera pa December 25. Detili linakhazikitsidwa mwadala kuti lilowe m’malo mwa maholide achikunja a Ufumu wa Roma: Sol Invictus (Dzuwa Losagonjetseka) ndi Saturnalia (holide yolemekeza mulungu wotchedwa Saturn). Mwanjira imeneyi, Tchalitchi chinafuna kupanga chotsutsana ndi chipembedzo chachikunja.
Mu theka lachiwiri la zaka za m'ma 4, tchalitchi cha Kum'mawa chinasunthanso Khirisimasi ku December 25. Kwa nthawi yoyamba, zikondwerero zosiyana pa nthawi ya Kubadwa kwa Khristu ndi Ubatizo wa Ambuye zinayambitsidwa ku Constantinople cha m'ma 377 AD molamulidwa ndi Emperor Arcadius.
Mu 1582, Papa Gregory XIII anayambitsa dongosolo latsopano la kuŵerengera zaka lotchedwa kalendala ya Gregory (kalembedwe katsopano), motero anawongolera kusagwirizana kowonjezereka pakati pa kalendala ya Julius ndi chaka cha zakuthambo. Maholide onse okhazikika, kuphatikizapo Khirisimasi pa December 25, anawonjezedwa pa kalendala yatsopano. Mipingo yochepa inapitiriza kugwiritsa ntchito kalendala ya Julius, pamene Khirisimasi inkadziwika pa December 25.
