Fields of Faith is typically held on the second Wednesday of October.  But it's about you and your area and what works best.  It's ok to start small and gather athletes together and talk about what verses have value and meaning.  It's an event that brings athletes and students together to help encourage reading the Bible.   That's the basics.  You can work your way up from there by having a worship band to sing songs and invite the community to attend.  Provide a snack bar with warm yummy drinks.  Host it outside or in the gym whatever works best.