That would exclude them from eating the dinner on Nisan 15, the principal day of the Festival of Unleavened Bread, which is seen as a component of the Passover time frame.
Lokho kungawakhandela bona angadli isidlo ngoNisan 15, ilanga lokuthoma loMnyanya weSikwa esinganaSibiliso eliqalwa njengeliyingcenye yePhasika.