The
Book belonging to Lambspring Monastery
Of the Order of Saint Benedict
Of the English monastic community. |
The
method of calculating the nones or ides after the kalends of the twelve
months. and also how many days they consist of…,,, |
January.
August and Dece
mber· have 4.nones
·19 kalends
after ides. and 31.
days. |
March. May
July and October
have 6. nones.
17. Kalends after ides
and 31 days. |
April·
Ju
ne. September and
November· have·
4 nones.
18. kalends after
ides. and 30
days. |
But February
has. 4. nones
16. kalends after
ides. and 28
.days |
and in a leap
year
has 29 days
and a moon
of 30. |
But all
months
have an octave
of ides. |
THE
RULES FOR CALCULATING THE FERIAL and the concurrent number. THE
RULES FOR CALCULATING LUNATIONS and EPACTS. |
March |
V |
B |
i.ii.iii.iii. |
September |
V |
D |
Zero |
|
|
April
|
I |
B |
vi.vii.i.ii |
October |
V |
G |
xi |
F |
xii |
May
|
III |
B |
iiii.v.vi.vii. |
November |
VI |
E |
xx.ii |
D |
xxiii |
June
|
VI |
B |
ii.iii.iiii.v.
|
December |
VII
|
A |
iii
|
G
|
iiii |
July
|
I |
B |
vii.i.ii.iii. |
January |
IX |
D |
xiiii |
C |
xv |
August
|
IIII
|
B |
v.vi.vii.i.
|
February |
X |
B |
xx.v
|
A |
xxvi |
September
|
VII |
B |
iii.
iiii.v.vi. |
March |
IX |
E |
vi |
D |
vii |
October
|
II
|
|
|
April
|
X |
C |
xvii |
B |
xviii |
November
|
V |
|
|
May |
XI |
F |
xxviiii |
|
|
December
|
VII |
|
|
June |
XII
|
B |
ix |
|
|
January
|
III |
|
|
July |
XIII |
G |
xx |
|
|
February
|
VI
|
|
|
August |
XIIII |
C |
i |
|
|
|
Add
together the regularis of each month and the concurrents of any year.
If 7 is the result, [day 7] is the ferial day which falls on kalends.
If it is more than 7, take away 7 and the remainder is the ferial
day that falls upon the KALENDS. |
Add
together the regularis of each month and the epacts of any year. If
30 or less is the number, that is the age of the moon which falls
upon the kalends. If the number is more than 30, take away 30 and
that which remains is the age of the moon that falls upon the KALENDS |