To me, the gregorian calendar was specifically designed and implemented to separate us from natural time cycles. We once moved with the cycle of the moon with thirteen 28 day months, but now we move to twelve months which are constantly changing in length from one month to the next. This is disruptive and a form on interference preventing us from remaining connected to the natural world on a deep level.
It's a lot like how advertising. "See what you're not? Feel inadequate now? Here buy this product to make you feel better", except it was the church saying 'Follow this calendar. Feeling separated from the natural world? Here follow this God."
RE: Time Cycles, Precession & The Schuman Resonance