I honestly don't think that God sweats that kinda stuff. I suspect He's a little bigger than that. Do you really think He runs to the Gregorian calendar anyhow?
Most things in life don't have a "great beginning", from religion to lipstick (think: animal testing). Even going to the Gym has its roots in the Greek games which were inspired by exceeding at warfare. Computers and the Internet were originally funded by the military, and what was one of the first uses of air travel? Warfare.
If you genuinely believe you should refrain from having anything to do with things that have had a not-so "great beginning" you'd be as well heading to a hermitage and becoming a monk. Oops - you probaly think that has pagan origins, too, huh?