It's a Sliding Scale

Dawson was trying to talk me into a later bedtime tonight over dinner. "It's not close to bedtime. We go to bed at 8:30."

"Not on school nights," I reminded him.

"Oh yeah, it's around 7:30 on school nights isn't it."

"That's what we shoot for.”

"And on broken arm nights," Aiden added, "it's 2 AM!"