Next friday is the 22nd of April. April is the fourth month of the year (04 - 22).
At EHAM one of the runways is 04 - 22 and is called ‘Oostbaan’. [Oost = East].
The Oostbaan is the shortest runway of Schiphol and the runway is used for privates jets. But by strong winds from the south west will the runway used for all aircrafts for landings.
So next friday is Oostbaan Day!