This weekend I came across a BL document with a number of birthdays in the
early 16th century which include the Dominical Letters. I have checked and
I think I now know roughly what these signifiy. What I do not know however
is whether the formula given for determining a DL today is the same as that
for one at the beginning of the 16th century, or whether all those calendar
changes have complicated the calculation? (It reminds me of the Easter Day
problem that came up a month ago)
Regards
John A.W. Lcok
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