I always took Galations 4:10 to refer to those who observed specific years, times of the year, and seasons. Such as those who celebrate spring, certain years (zodiac), etc.
What about observing Christ's birth, Christ's resurrection?
The situation in Gal 4:10 was that the believers were trying to please God by observing specific and set times of the year. Whether that is Jewish days or Christian days, it makes no difference really.
Every Easter and Christmas the church attendance numbers increase 10 fold with people trying to please God by remembering His death and His birth. They are Christians who go to church at Christmas and Easter but don't really go any other time.
Keeping Easter and Christmas is seen as a meritorious work, and Christians look down upon other Christians who do not keep Easter and Christmas.
This is despite the fact that the Lord Jesus never commands or asks us to observe these occasions. The only form of remembrance that Christ asked us to keep was to remember Him by partaking of bread and wine.
Partaking of various festivals is a Jewish and pagan concept. For the Christian, the whole life and every day of the year belongs to the Lord.
Despite Easter and Christmas being an aged tradition, the majority of protestant and free churches observe the occasion in a spirit of religious bondage. The pressure to observe these occasions comes from secular and Christian alike. It is religious bondage because it is one of the busiest times of the year for churches, busy and stressed with activities that the Lord doesn't even command.
There is a lot of research out there that shows the origins of Easter and Christmas are pagan:
In 354 A.D., Bishop Liberius of Rome ordered the people to celebrate on December 25. He probably chose this date because the people of Rome already observed it as the Feast of Saturn, celebrating the birthday of the sun (Sechrist E.H. Christmas. World Book Encyclopedia, Volume 3. Field Enterprises Educational Corporation, Chicago, 1966, pp. 408-417).
The early church did not keep special feast days, so as to be clearly differentiated between paganism. Christians are warned not to adopt the practices of pagan countries, which would include Easter and Christmas, which fall on the same days as observed pagan practices in Rome and Greece at the time (Deut 12:2-4, 18:9-12).
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