First u have to know how the hebrews count their day n night yenesu qen qoxera keseat11-lelit11then kelelit 11seat eske keseat 11seat one day nw lenesu yenesu qen qoxera demo meshto senega nw 1day yemebalew like ortizefexret lay endalew meshe keza nega and qen hone endalew malet nw n now back to the topic geta yeteseqelew 6seat yemotew 9seat yeteqeberw bearb let11seat lay nw soooo bcz of this 11:01say hon befit seleteqebere mulu arbn meqaber wusx endasalefe nw yeteqoxerw n bcz of that arb 1day hone then kidame mulu qenun meqaber wusx nbr the ehud 9seat lay nw yetenesaw on the 3rd day n bcz of that 3days 3nights mexa aqoxaxeru or in simpler form -11seat Friday seleteqebere mulu Friday meqaber wusx endenebere teqoxere -then kekeseat11-lelit11 seat then kelelit 11seat-keseat 11seat one day selehone Saturday muluwn asalefe meqabr wusx -then kekeseat11-lelit9seat seladere Sunday arfo nbr n that's how 3days 3nights yeteqoxerew