sincerly said:
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To each his own.
Mike, GOD hasn't stated that birthdays were not to be celebrated. That "opinion" in your "faith"/congregation is dictated by the "governing bodies" approved decision. and a misunderstanding of the scriptures.
GOD does disapprove of many things and has specifically expressed such in the Scriptures---one doesn't have to guess/suppose/fabricate to build a decision which GOD did not express. That was done with the observance of Birthdays.
GOD specified the "pagan" practices which were an abomination to HIM---and HE listed a lot of practices which are contrary to HIS Laws of Love.
Everyone will choose to obey or disobey that which is in conflict with HIS WILL.