I got skunked on 4 stands Sun. Don't get discouraged yet, predator calling is never 100%. I find the best time to be after a dark cold night. If the morning after is slightly overcast with about a 5 mph wind. It never hurts to do some day time scouting just to make sure there are coyotes where you are trying to call them. Be cautious if you do scout, don't go spreading your scent all over the place. Try to find areas with a lot of scat, tracks in softer dirt, and I also look for places with a high concentration of rodent holes.