New Perpetual Calendar

By Paul Freeman

A,B,C,K,F,G,A

I,D,E,F,N,B,C

D,L,G,A,B,J,E

F,G,H,C,D,E,M

A,D,D,G,B,E

G,C,F,A,D,F

A,D,E,A,C,F

A,D,G,B,E,G

The top  table illustrates a 28 year cycle. The initial ‘A’ equates to 1905. Add 28 and the first ‘A’ corresponds to 1933, 1961, 1989, 2017, 2045, 2073 etc. Deduct 28 to get earlier cycles. For instance, 1969 will be ‘D’ (1961 (‘A’) plus 9). That letter corresponds to the table below which gives the letters for individual months of the year in question,  January to December, according to one of the lettered monthly calendars at the bottom of the page.

                                                      A

A,D,D,G,B,E,G,C,F,A,D,F

B

B,E,E,A,C,F,A,D,G,B,E,G

C

C,F,F,B,D,G,B,E,A,C,F,A

D

D,G,G,C,E,A,C,F,B,D,G,B

E

E,A,A,D,F,B,D,G,C,E,A,C

F

F,B,B,E,G,C,E,A,D,F,B,D

G

G,C,C,F,A,D,F,B,E,G,C,E

H

A,D,E,A,C,F,A,D,G,B,E,G

I

B,E,F,B,D,G,B,E,A,C,F,A

J

C,F,G,C,E,A,C,F,B,D,G,B

K

D,G,A,D,F,B,D,G,C,E,A,C

L

E,A,B,E,G,C,E,A,D,F,B,D

M

F,B,C,F,A,D,F,B,E,G,C,E

N

G,C,D,G,B,E,G,C,F,A,D,F

Input dates into the fields below to check the result. (As if you were in any doubt!)  

Finally, here's a PDF to download and print 

This site and its contents (c) Paul Freeman (2012)