Actually thirteen months is based entirely on the lunar cycle. 28 day months
with Samhain as the day between all days, when the veil was thinnest. A time
that is not a time. This thirteen lunar month cycle is part of the mnemonic
cycle that reoccurs every 19 years, and was acknowledged by the Druids. That
is to say a full moon will occur on the same day of the same month, every
nineteen years.Stonehenge and other ancient sites were based upon this
mnemonic cycle that was often marked out with posts or stones to note the
change in lunar positions. Blue moons, which are the second full moon of a
calendar month, are not that rare and occur at least once every two years.
The change from thirteen to twelve months seems to have occured during the
transition to patriarchal society.
BTW, July and August are not the only months with 31 days. Try January,
March May, October and December. October and December (from Latin for eight
and ten) became moved to where they are know as a result of the insertion
months of the emperors in question.
>I believe our celtic ancestors have choosen thirteen as a number to divide a
>year into months because 13 is the best divisor for 365 days (365/13=28.08;
>365/11=33.18; 365/12=30.42) after number 10.
>They also find it logical because of the lunar cycles.
>I've also heard about a nine days week.
>Perhaps such a calendar would have a better effect on the world economy
>today. After all, number twelwe was used by the romans for political
>reasons, with two emperors (Ceasar and Augustus) quarelling for giving
>their names to July and August (31 days: the maximum of course).
>July and August should be renamed. It's a shame that the most beautiful
>month of the year have such names when we remember what happened
>2000 years ago in Gaul and on the Islands.
>(look at Summer Time: calendars and time can be modified)