good question 😊 1st yetignawum protestant sew orthodox completely sihtet nw mil yelem! i mean bzu common grounds alun 1 miadergen for example: the deity and nature of Jesus Christ, the Holy Trinity (Silase) ena bzu bzu. gn also minileyaybet part alen like salivation, sireatoch ena bzu, so malet yefelekut Tewahido hulum astemiro yetesasate nw mnamn blo bezi concept banwesd des ylegnal, why we have so many common grounds 1 mnhonibet! wede ur question smeta dgmo, የገናን በአል Tehasas 29 miakebrew ye Ethiopia Orthodox Church Calanderbicha aydelem! it's Julian calendar(google adrg); 200 million Christians around the world kegna gar be temesasay ken nw miakebrut (not only Ethio Orthodox Tewahdo church!!!!!) ena ye Ethiopia Orthodox Tewahido Church yemitiketelew this calander nw not Gregorian calendar. be matekaliya simelisew dgmo lmn takebralachu ke Orthodox gar lemilew: ye Ethiopia History be bizat yemiyayazew ke Orthodox Church ga nw obviously. so enkuan የገና በአል; ye zemen akotater rasu Muslim Christians of Ethiopia yemiketelut this 2016 nw, ena this calendar dgmo backgroundu sitay ke coptic church(egypt allexiander) ga yiyayazal google it! so it's historical domination nw enji Personally ye Ethiopian Orthodox church hono sihtet nw eyaln aydelem minakebrew, it's almost culture leza nw hulum haymanot meskerem 1 new year miakebrew! because we're ethiopians😊 it's abt to calanders not two religions! teredtehgnal a?