# When were those men to keep the Passover rather than on the 14th day of the 1st month?

Those men who were unclean or on a long journey kept the Passover on the 14th day of the 2nd month. 

# What were some rules for keeping the Passover?

They ate the Passover with bread without yeast and bitter herbs and left none of it until morning while not breaking a bone of the animal. 