The proponents of a 15th Passover discount clear scriptural details and instead speculate. One cannot build doctrines on implication, distortion, and traditions.
Using subterfuge, some proponents of the 15th Passover muddle up otherwise clear, day and night issues by surreptitiously inserting modern English language usage.
Nine steps had to be included with the Passover observance, all within the house until morning. It takes place between sun's setting and complete darkness.
How can we know which day is the true seventh day God blessed and made holy? Has time been lost? Were not ten days dropped out of it at one time?