Passover takes place at twilight as the 14th of Abib begins. Unleavened Bread begins 24 hours later on the 15th of Abib. The Passover is a preparation day.
The term 'selfsame day' refers to the covenant God made with Abraham 430 years before the Exodus, which occurred on the day after the Passover.
Deuteronomy 16:1-8 refers to Unleavened Bread rather than Passover (a scribal error, perhaps referring to the season). Ten clues clear up this misconception.
Are we merely performing a ritual or are we making sure the real point of deleavening and keeping these days does not get lost in the physical activity?
God has imputed righteousness to us as His Children because we are in Christ. Our state before God is unleavened provided we maintain this relationship.
The book of James applies to us after the sanctification process has begun. The most effective way of eliminating sin is to do righteousness.
When it looks like things are out of control, God is busily at work behind the scenes. If we replace anxiety with faith, God will grant us divine peace.
One major incident involving the blowing of trumpets occurred at the outset of Israel's incursion into Canaan, when God brought down the walls of Jericho.
If we go to the Feast with the goal of physically enjoying, we may lose out on both the spiritual and physical benefits. 'Going through the motions' defiles it.