the.com/timetable
a promise that trains, teachers, and time itself rarely intend to keep
means A schedule listing the times at which events, departures, or activities are planned to happen.
from A transparent English compound: "time" + "table," where "table" means an orderly arrangement of information set out in rows and columns — the same sense as in "multiplication table." That "table" traces back through Old French to Latin "tabula," a flat board or plank, which came to mean a board for writing or displaying figures. So a timetable is, quite literally, time laid out on a board. The word came into use in the 19th century, riding the railways — for what is a railway without the comforting fiction of when trains arrive?
railway originStandardized clocks exist because trains needed synchronized timetables
first publishedBritain's 1839 Bradshaw's Guide listed every railway departure
time zonesCreated in 1883 so timetables could finally agree
school dreadMonday morning slots ranked humanity's least loved squares
theoretical limitGenerating perfect school timetables is mathematically NP-hard