Did you know that celebrating birthdays, which in ancient Greece and Rome you did for a "god" or "emperor" (who wanted to be worshiped as a god) was considered a PAGAN practice by early Christians?
Did you know that in some middle eastern cultures they still don't celebrate birthdays?
Now do you understand why Jesus birthday celebration wasn't something the people living in Rome who knew Christ cared to do. Mary was alive and the most likely source of Luke's gospel which has the whole infancy narrative of Jesus. If he interviewed her, the woman who give birth to the man (even if you think he was an ordinary man) do you think Mary carried a calendar around?
a) Questioning "when" permits those who answer to date/datus/dare - "to give; grant; offer", which ones consent to the answer then takes.
b) The natural order doesn't generate "common people", but each unique person. Ones consent to suggested common-ism and popul-ism permits few to ordain many into groups.
c) A birth implies a setting apart of an off-spring. Few exploit birth-daze to date birth, hence gaining control over an affixed date, while distracting each off-spring from the passage of self-discernment aka the coming into being from origin.
Thanks to birthdays...ones origin can be buried within calendars, which makes one accountable to others, who also utilize numbers to distract ONE from discerning self. Calendars utilize DAZE (days) of the WEAK (week) to distract from sun (son) and moon (month).
d) Celebrate/celeber - "frequented, crowded"... a suggested inversion of action (perceivable) setting frequent reactions (perception) apart from one another. Consenting to a suggestion crowds many frequencies together, hence distorting them.
In other words...each ones free will of choice implies frequent adaptation, while following the choices of others lowers ones frequency.