Occult Holidays or God's Holy Days - Which?

What is the true origin of today's widely accepted holidays, Halloween, Christmas, Easter, etc., and how did such days come to be embraced as "Christian" dogma? Likewise, what happened to the biblical festivals God gave to ancient Israel and which were observed by the original, true apostolic Church? Through the centuries, how and why were God's holy days recklessly cast aside as obsolete by orthodox "Christian" authorities?
ASIN: 0967547970
VSKU: BVV.0967547970.A
Condition: Acceptable
Author/Artist:Fred R. Coulter
Binding: Paperback
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Condition Notes: The item is very worn but is perfectly usable. Signs of wear can include aesthetic issues such as scratches, dents, worn and creased covers, folded page corners and minor liquid stains. All pages and the cover are intact, but the dust cover may be missing. Pages may include moderate to heavy amount of notes and highlighting, but the text is not obscured or unreadable. Page edges may have foxing age related spots and browning . May NOT include discs, access code or other supplemental materials.