« first day (4569 days earlier)      last day (611 days later) » 

XKCD
XKCD
3:03 PM
3D graphs that don't contact the plane in the closure area may proceed as scheduled, but be alert for possible collisions with 2D graph lines that reach the hole and unexpectedly enter 3D space.
2

« first day (4569 days earlier)      last day (611 days later) »