Lunar Halo

For the love (or lack thereof) of John Cusack, whatever you're seeing in the sky has nothing to do with the end of days. "I would like to talk to you about Thomas Aquinas" - now, that has something to do with End of Days (1999). What you're seeing in the sky is called a lunar halo. Light from the sun is first reflected off of the moon and then refracted by the airborne ice crystals in high level cirro-stratus clouds.