User blog comment:Dereviewer/A Show's End/@comment-24763540-20151005202514/@comment-25016556-20151006224656

Mabel did say summer is almost over, however, she also said their birthday was in a week, and the calander looked like it was at the very end of August. But its funny you bring up Phineas and Ferb because Alex commented that P&F's summer was more based on emotion than actual days. Maybe he feels the same way with Gravity Falls.