Hecho matemático: 4023 is the number of ways to tile a 3×23 rectangle with 3×1 rectangles.
Trivia: 4023 is an unremarkable number.
Fecha histórica: January 5th is the day in 1993 that the oil tanker MV Braer runs aground on the coast of the Shetland Islands, spilling 84,700 tons of crude oil.