Respect your employees personal time. Please do your best not to “bother” your staff (except in rare, emergency situations of course) outside their work hours with work related questions and responsibility. If you find yourself consistently contacting people outside work hours chances are that there’s a big problem at play. You may have “bottlenecks” within your operations and you should take the time needed to audit your structure and address the root cause of the issues.
This is their personal time to be spent and enjoyed with families, friends and other non-work related activities and events. Remember that after all, work is a part of our lives, not our entire life.