What is time? And why does it seem to shift in motherhood? See Exhibit A—Things that go on forever: Getting your kids to put their shoes on, bedtime stalling and the Caillou theme song. ? Things that fly by: The baby stage, date night and your morning to sleep in. Motherhood messes with the space-time continuum, which is all the more reason we’re soaking up what’s special about every single stage. Help us Albert Einstein, because babies don’t keep.