the.com/olympiad

means A four-year span marking the interval between Olympic Games, or more broadly, any major competitive event (especially in math, science, or chess) staged on a similar grand, periodic scale.

from From Greek 'Olympias,' tied to Olympia, the sacred site in the Peloponnese where athletes gathered every four years to compete in honor of Zeus. The ancient Greeks actually used Olympiads as a unit of time itself — historians counted years by which Olympiad they fell in, the way we'd say '2024.' The word later lent its prestige to any contest that borrowed the format of fierce, periodic, title-on-the-line competition — which is how it ended up presiding over rooms full of teenagers solving differential equations for sport.