The Handy Calendar

What day of the week is it? For calendar calculating like savant syndrome.

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After “n"

There are 3 positions separated by joints on your index finger, middle finger and ring finger, on your left or right hand. We will assign numbers to 7 of these positions. The index finger has 0, 1 and 2 from the tip, the middle finger 3, 4 and 5, and the tip of the ring finger is 6.

Count each position with your thumb starting from the beginning, like 0, 1, 2, 3, 4, 5, 6, 0, 1…
This order is your basis, so please remember it.

Now, choose any position p (p = 0, 1, … ,6), and count from that position using the order mentioned before. When doing this, we will call the n-th position (n = 0, 1, … ,6) n times after p.

For example, 3 times after 4 is 0, 2 times after 2 is 4, 4 times after 5 is 2, and 0 times after 3 is 3.

Especially when n = 1, 4, 5, it is needed to move the position n times after the current one. Set n to 1, 4 or 5, and continuously practice moving n times forward.

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