Events outside the window are hidden, not dimmed: an event that is over is not a place. Nothing else on the map changes.
Deep time, by period · click a period, shift-click two for a range
The oldest collections here are Triassic: this set is dinosaurs and birds, so it begins when they do. Nothing outside the window is drawn.
A year back and two ahead, by week · click a column for that week
music
stage & screen
fairs & food
spectacle
untyped
Or pick a month · shift-click two for a range
public holiday in some regions only long weekend · holidays: zoom in to a region