God's Sabbath and holy days are sacred times that cannot be rescheduled, yet for the vital annual event of Passover, He provides a way to observe it at a later time if it is unavoidably missed. This provision is known as the Second Passover, emphasizing the importance of participating in this observance even if the regular time is missed due to unavoidable circumstances. In the time of Hezekiah, as recorded in II Chronicles 30, the king sent word to all Israel and Judah, including Ephraim and Manasseh, to keep the Passover at Jerusalem. However, they could not observe it at the appointed time in the first month because not enough priests were sanctified, nor had the people gathered. Thus, it was agreed to hold the Passover in the second month, on the fourteenth day. Many assembled in Jerusalem, kept the Passover, and also observed the Feast of Unleavened Bread in the second month, marking a significant occasion of revival under Hezekiah's reforms. The permission for a Second Passover is detailed in Numbers 9, where the Lord spoke to Moses, establishing that the Passover must be kept on the fourteenth day of the first month at twilight. Yet, for those defiled by a human corpse or far away on a journey, they may still keep the Lord's Passover on the fourteenth day of the second month at twilight. They are to observe it with unleavened bread and bitter herbs, leaving none until morning and breaking no bones, following all the ordinances of the Passover as in the first month. The reasons for taking the Second Passover are limited to uncleanness, such as serious sickness requiring quarantine, or absence due to an unexpected emergency journey, ensuring that only dire circumstances justify its use. The Lord emphasizes the gravity of missing the Passover without valid reason, stating that anyone who is clean and not on a journey, yet fails to keep the Passover at its appointed time, shall be cut off from among his people and bear his sin. This underscores the importance of observing the Passover at the proper time, with the Second Passover as a rare exception for unavoidable situations, ensuring that His command is honored.

The instructions for the second Passover, as given in Numbers 9:9-12, remain unchanged from the original commands for the Passover. The Lord spoke to Moses, declaring that if anyone is unclean due to contact with a corpse or is on a distant journey, they may still keep the Lord's Passover. This observance is to occur on the fourteenth day of the second month, at twilight. They are to eat it with unleavened bread and bitter herbs, leave none of it until morning, and not break any of its bones. According to all the ordinances of the Passover, they shall keep it, ensuring that every rite and ceremony is followed without modification.

During the reign of Hezekiah, a significant revival occurred, marked by an unusual observance of the Passover in the second month, as detailed in II Chronicles 30. Due to the spiritual emergency and the need for reform after the desecration under Ahaz, Hezekiah took control, commanding the celebration of both the Passover and the Feast of Unleavened Bread thirty days later than prescribed. This was in accordance with the allowance in Numbers 9 for those unclean at the time of the first Passover, though it extended beyond the original command by including the Days of Unleavened Bread, which was not specified in the law. Hezekiah's actions were driven by a sincere belief that the nation's survival depended on this reform, centralizing worship at the Temple to oversee the proceedings and prevent pagan practices. The Passover lambs were slaughtered on the fourteenth day of the second month at the Temple, with Levites handling the slaughter for those who were not sanctified, and priests sprinkling the blood, differing from the traditional home-based observance. Many from Ephraim, Manasseh, Issachar, and Zebulun ate the Passover without proper cleansing, contrary to what was written, yet Hezekiah prayed for them, and the Lord listened and healed the people. This event marked the first scriptural indication of linking Passover and the Days of Unleavened Bread together, a practice later reflected in the Jewish custom of referring to the entire period as Passover. Despite these deviations, necessitated by the pervasive paganism among the Judeans, the core commands of God regarding Passover remained unchanged, as this was an exceptional circumstance driven by the king's authority to avert national calamity.

The second Passover, as outlined in Numbers 9, reinforces the importance of adhering to all the rites and ceremonies of the original Passover. Even if a person missed the first Passover due to being on a journey or being unclean, they were not excused from any of the ceremonies or rites connected with it. Numbers 9:12 states, "They shall leave none of it until morning, nor break one of its bones. According to all the ordinances of the Passover they shall keep it." This second observance, occurring one month later, had to be conducted exactly the same way as the first, despite the Israelites no longer being in Egypt but in the wilderness. God reconfirmed that nothing was to be omitted, ensuring that all aspects of the Passover, beyond just the killing of the lamb, were to be meticulously followed as they were during the initial event.