Karl Palmen's Playing Card Calendar

Date: Tue, 05 May 1998
To: Mario Hilgemeier (originally submitted to CALNDR-L in March 1998)
From: Karl Palmen
Subject: Re: playing card calendar
(original email was slightly edited and updated in May, August, November 1998)

Upon looking at various calendars that have whole 7 day week years or any adaptation of the other calendars on the calendar reform page

I've come to the conclusion that it would be best to do away with months and if tolerated that they have 4 or 5 whole weeks.

I find the 52/53 week year of the ISO calendar rather dull, so I brightened it up by using playing cards to represent the weeks. This also enables the suits to represent quarters.

For those who object to playing cards, the quarters and weeks could be given some other name. But playing cards are so familiar that they would form a practical naming system.

I've revised the suits to be in alphebetical order
Clubs, Diamonds, Hearts, Spades

An ISO type notation for the week 1998W10 could be 1998-1W10 or 1998S1W10
or for readability 1998s1w10
and an informal short for 10c with 10c5 for the date.

The correspondence between ISO weeks and playing card weeks would as revised be

      Clubs   Diamonds   Hearts  Spades

Ace    01        14        27      40
Two    02        15        28      41
Three  03        16        29      42
Four   04        17        30      43
Five   05        18        31      44

      Clubs   Diamonds   Hearts  Spades

Six    06        19        32      45
Seven  07        20        33      46
Eight  08        21        34      47
Nine   09        22        35      48
Ten    10        23        36      49

      Clubs   Diamonds   Hearts  Spades

Jack   11        24        37      50
Queen  12        25        38      51
King   13        26        39      52

Joker      53

Date example:
1998-05-05 is
ISO week 19, therefore
Tuesday Six of Diamonds


I've since found a different playing card calendar at

(a nice big graphic shows the year-circle of cards)

It uses Jokers to increase the number of days in a year from 364 to 365 or 366 rather than to provide a 53rd week.

(end of email)

More playing card math

The seven-day week's history and the connotations for each weekday

Karl Palmen's Calendars


Essays on mathematical themes

Copyright 1998, Karl Palmen, (contact info) . Published with permission.
© HTML Copyright 1998, Mario Hilgemeier, email: contact
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