APPENDIX4.
‘Naming the Day’

The twin facts that every week has seven days and that every
year (other than leap years) has a fixed cycle of 365 days
enable us, by making allowance for the leap years inter-
vening, to relate any two days in time by a set formula.
Examples of the fixed relationship between the days of any
two weeks may be seen on any calendar in any month, thus:
MR W B R il
b TR S 9
8 G 30 eR Ra e e
PRI R R e R
QE 0SB TeR e e el
29 3 31 — — —

If a rectangle be drawn anywhere on the calendar, so as to
enclose some of the numbers but excluding the blank spaces,
then the numbers at the opposite ends of one diagonal
when added together will be equivalent to the total of the two
end numbers on the other diagonal. Thus, from the above
example:

5+27= 6426
and 15+431=17-+29

If the rectangle is a square, then the same total is also pro-
vided by the top and bottom numbers in the centre column
and also by the first and last numbers in the centre row.

Thus, 15+31=17-+29

=16430
=22424
A square of this type is an incomplete magic square and the

reasons why such a pattern results is simply explained. Every
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