February has 28 days. The moon has 29.

K original: "K" for Kalends, the first day of the month.

4th [day before the] Kalends. Saint Brigid, Virgin. Saint Brigid of Kildare, one of Ireland's patron saints, whose feast is February 1st.

Golden NumberA number from 1 to 19 used to determine the phase of the moon and the date of Easter.	Dominical LetterA letter (A-G) used to find which day of the week a date falls on in a given year.	Day of the Month	Feast / Event
xi	d	4th [before the] Nones
xix	e	3rd [before the] Nones
viii	f	2nd [before the] Nones
	g	NONES
xvi	a	8th [before the] Ides	O Octave. Lighting of the Fire. Saint Agatha, Virgin and Martyr. Saint Agatha of Sicily, a popular early Christian martyr.
v	b	7th [before the] Ides	Lighting for the 40 days [Lent] Saints Vedast and Amand. Vedast and Amand were influential 6th-7th century bishops in Gaul.
	c	6th [before the] Ides
xiii	d	5th [before the] Ides
ii	e	4th [before the] Ides	Saint Scholastica, Virgin. Saint Soteris and Saint Austrebertha. Scholastica was the sister of Saint Benedict.
	f	3rd [before the] Ides
x	g	2nd [before the] Ides
	a	IDES
xviii	b	16th [before the] Calends of MARCH	Saint Valentine, Priest. Saint Valentine. Saint Valentine of Rome and Saint Valentine of Terni, often associated with the same feast day.
vii	c	15th [before the] Calends	Saints Felix and Zeno.
	d	14th [before the] Calends	Saint Juliana, Virgin and Martyr.
xv	e	13th [before the] Calends
iiii	f	12th [before the] Calends
	g	11th [before the] Calends
xii	a	10th [before the] Calends
i	b	9th [before the] Calends
	c	8th [before the] Calends	The Chair of Saint Peter Commemorates Peter's bishopric in Antioch and Rome.
ix	d	7th [before the] Calends
	e	6th [before the] Calends
xvii	f	5th [before the] Calends	Place of the Leap Day original: "Locus Bissexti." In the Roman calendar, the extra day of a leap year was inserted by doubling the "sixth day" before the Kalends of March.
vi	g	4th [before the] Calends
	a	3rd [before the] Calends
xiiii	b	2nd [before the] Calends

Adjacent to the text, a miniature painting illustrates the month of February. In the upper half, a man in a thick, fur-trimmed winter cloak huddles indoors, warming a cooking vessel over a crackling fire. In the lower half, a second figure lies on the ground, vigorously operating a set of large wooden bellows to keep the flames high. This depicts the typical "Labor of the Month" for February: seeking warmth and domestic labor during the peak of winter.

Remember that in a leap year original: "anno bissextili" you should compute 29 days for the moon of February, so that both the lunar days of March and the [solar] days are held just as they are always accustomed to be held, lest the peace of the lunar month waver.

Night has fourteen hours. Day, truly, has ten.