We are sourcing for a handful of different positions right now (more than just sales positions) and are seeing an interesting trend. The major job boards (CareerBuilder and Monster) are most active on Tuesday. We post our ads on Tuesday and receive most of our responses on that day and the next day (Wed.). The smaller, niche sites seem to be more active on the weekends – mainly Friday afternoon and Saturday.
Keep that trend in mind next time you post an ad.