We usually cruise in january. However we didnt know what yeshiva was. It is the kosher jewish spring break. More than half the ship was reserved for this group. That meant that the adults only section and serenity cafe was closed to non jews. The main dining was a disaster as half the ship could only eat special food. That meant people bringing their own plates and silverware and food. Many of the entertainment venues were for jews also. Do your thing. I think its great but why wasnt i informed? This year its jan 17 ,2021 on oasis followed by the jewish music cruise on jan 24, 2021 also on the oasis. Please check the kosherica cruise website to verify. There are a lot of kids on this cruise and the kids program was a madhouse. My 5 year old was overwhelmed by the loudness and didnt want to go after the first day. I did get a 100 credit towards next cruise but i really should have received full credit.