The Romans did not number days of a month sequentially from the 1st through the last day. Instead, they counted back from the three fixed points of the month: the
Nones (5th or 7th, depending on the length of the month), the
Ides (13th or 15th), and the
Kalends (1st) of the following month. The Nones of August was the 5th, and the Ides the 13th. The last day of August was the
pridie Kalendas Septembris, "day before the Kalends of September". Roman counting was
inclusive; 9 August was
ante diem V Idūs Sextīlis (
ante diem V Idūs Augustas), "the 5th day before the Ides of August," usually abbreviated
a.d. V Id. Sext. (
a.d. V Id. Aug.), or with the
a.d. omitted altogether. The Julian calendar reform added two days to Sextilis; thus on the pre-reform calendar, 23 August was
VIII Kal. Sept., "the 8th day before the Kalends of September," but on the Julian calendar
X Kal. Sept., "the 10th day before the Kalends of September". On the calendar of the
Roman Republic and early
Principate, each day was marked with a letter to denote its religiously lawful status. In August, these were: •
F for
dies fasti, days when it was legal to initiate action in the courts of
civil law; •
C, for
dies comitalis, a day on which the Roman people could hold assemblies
(comitia), elections, and certain kinds of judicial proceedings; •
N for
dies nefasti, when these political activities and the administration of justice were prohibited; •
NP, the meaning of which remains elusive, but which marked
feriae, public holidays; •
EN for
endotercissus, an
archaic form of
intercissus, "cut in half," meaning days that were
nefasti in the morning, when
sacrifices were being prepared, and in the evening, while sacrifices were being offered, but were
fasti in the middle of the day. Days were also marked with
nundinal letters in cycles of
A B C D E F G H, to mark the "market week" (these are omitted in the table below). A
dies natalis was an anniversary such as a temple founding or rededication, sometimes thought of as the "birthday" of a deity. During the
Imperial period, some of the traditional festivals localized at Rome became less important, and the birthdays and anniversaries of the emperor and his family gained prominence as Roman holidays. On the calendar of military religious observances known as the
Feriale Duranum, sacrifices pertaining to
Imperial cult outnumber the older festivals. After the mid-1st century AD, a number of dates are added to calendars for
spectacles and games (circenses) held in honor of various deities in the venue called a "
circus". By the late 2nd century AD, extant calendars no longer show days marked with letters
(F, N, C and so on) to show their religious status, probably in part as a result of calendar reforms undertaken by
Marcus Aurelius. Festivals marked in large letters on extant
fasti, represented by festival names in all capital letters on the table, are thought to have been the most ancient holidays, becoming part of the calendar before 509 BC. Unless otherwise noted, the dating and observances on the following table are from
H.H. Scullard,
Festivals and Ceremonies of the Roman Republic (Cornell University Press, 1981), pp. 169–182. After the Ides, dates are given for the Julian calendar, with pre-Julian dates noted parenthetically for festivals. ==References==