A multi-day event drags one piece per day, and a middle day's piece is a
full 24 hours — taller than the viewport, its top at a midnight scrolled
out of sight. The range went to the tallest piece by raw height, so it
was drawn at that top, off the timeline entirely, and the overlay draws
unclipped so the piece painted over the headers as well.
The copy is now clipped to the timeline, the range goes to the piece
with the most of itself in view, and a piece whose top has scrolled off
brings its text down to the visible edge and budgets from there.
The title is also served in full before the range: the hour gutter still
says where the copy sits, so the range is the half that can afford to go.