Many Christians know nothing about Biblical Holydays. Paul wrote to the Gentile believers in Colossians 2:16-17 that the holidays "are a shadow of things to come." Each of the spring holidays is a picture of Christs (Yeshua) first coming. Jesus(Yeshua) was sacrificed for our sins on Passover, buried on Unleavened Bread, and arose on Firstfruits. The fall holidays are a picture of His second coming and the beginning of the Messianic reign.
The Festivals of God are a blueprint for the plan of God. When we look at the spring festivals, we can look back at the first century and see how the prophetic elements of those festivals were full filled. We can see how the plan of God was carried out in perfection. The Biblical Holidays were instituted by God (all but Hanukkah and Purim) as an integral part of the divine worship system of the church (Old and New Testament) They are not a matter of salvation or approval before God, They are, as He intended, a remembrance and memorial in honor of what God has done for His people.
But what about this verse? "Ye observe days, and months, and times, and years. I am afraid of you, lest I have bestowed upon you labor in vain" (Gal. 4:10-11).
Here is a classic example of faulty interpretation of scripture. This reference has nothing to do with Biblical memorial days. Paul's statements to the Galatians is concerning their returning to former pagan or heathen practices. Clearly he is not speaking of Biblical celebrations, which is borne out in the very structure of the letter itself. Notice that this was something they were re instituting which they had been practicing when they worshipped false gods (see verse nine). The Galatians had never celebrated Biblical holy days, because they were Gentiles.
There is a revival in the land! Many are turning away from man-conceived concepts of worship to Biblical patterns. The motive for celebrating the holidays should be as God originally intended; a memorial, a remembrance and honor for what He has done. we don't need to be concerned with ancient ritualism customs, but we should focus on the basic principle of the holidays' prophetic and spiritual meanings as is revealed under the New Covenant (Rom. 1:6)
So on a personal note, what we do here is read what The Father has written and filter that through the culture of the times that it was written and then to our best ability, celebrate His Mercies, His Promises, His Grace, His Love, His Word; and sit in awe of His Wonders. We do recite the Psalm daily, and we as a family and as individuals (even the small children) reflect and ask The Father to show us our trespasses and ask His forgiveness, and ask Him to help us to overcome them and to make us a light that shines and can not be hidden. It is a very personal time to devote to our Father and a time to pull away from ourselves. The Lord reveals more to us each year as we walk through the holidays.