Nayarit/Vallarta Time Zone Boundary Explained

Nayarit's Bay of Banderas Municipality joined Central Standard Time a few years back because it was getting too confusing to stay out of sync with Puerto Vallarta's airport and port. But the zone changes before Guayabitos - between Lo de Marcos and Ursulo Galvan. Set clocks back one hour going north, and if headed for PVR, one forward, so you're sure you won't be late.