Year-round school and varying start dates for schools that do stick to seasons make it hard to plan events and vacations and (for writers, anyway) articles about graduation and back-to-school. Join About.com parenting experts Terri Mauro (specialchildren.about.com), Catherine Holecko (familyfitness.about.com), Katherine Lee (childparenting.about.com), and Lisa Jo Rudy (autism.about.com) as we compare notes on when summer begins and ends and offer tips on how families can deal with the lack of consistency and predictability in this and other school breaks.