This is a very clever system used to do the classic diary trick using one calendar and one deck of cards. It is also very easy and does not require any memory work.

You begin by handing the spectator a monthly day planner (also known as a diary or calendar) which has different names of playing cards written on each date.

You then show a deck of cards and shuffle it a few times as you ask your spectator to name any date.

The spectator then selects a card and places it aside. When they look through the diary to see what card is on their date, it turns out to be the same card that was just selected.

Comes with the printed day planner and access to an online video tutorial in Japanese with English subtitles. Use your own deck.