Salvete
I am a little late with this post. Already it is pridie nonae, a dark day for us. I was held up trying to find more on the month of September. Not much in the way of calendars, as people were mostly gathered in town for the Ludi Romani, followed by several days of marketing. In the original farmer's calendar, given by Varro, September 13 marked the beginning of the New Year.
SEPTEMBER
The seventh month of the year is sacred to Vulcanus.
...When now the farmer to his yellow fields
The reaping-hind came bringing,
Even in act to lop the brttle barley heads
~Vergil Geo. I.313 ff.
1 N: KALENDS 30 Aug: Juno Regina on the Aventine, 392 BCE. Jupiter Tonans on the Capitoline. Jupiter Liber (Saturnus).
2 IV Non 31 Aug F: Cicero delivers the first Philippic, 44 BCE. Defeat of Marc Antony's navy at Actium, 31 BCE.
3 III Non 1 Sept. C:
4 Pridie Non 2 Sept. F: Fall of the Roman Empire, 476 CE, when Odovacar deposes Romulus Augustulus
5 NONAE Sept 3 Sept F: Jupiter Stator in the Circus Falminius, 146 BCE.. LUDI ROMANI 5-12 Sept.
6 VII Idus 4 Sept. F: Ludi Romani
7 VII Idus 5 Sept. C: It is the greatest consequence to the grape that it be gatheres while the moon is on the increase.
8 VI Idus 6 Sept C: Ludi Romani
9 V Idus 7 Sept C: Ludi Romani
10 IV Idus 8 Sept. C: Never plant reeds unless rain is impending (Pliny 18.78).
11 III Idus 9 Sept. C: Ludi Romani
12 Prid. Idus 10 Sept. N: Half of Arcturus is visible, a portent of boistrous weather on land and sea for five days (Pliny 18.74).
13 IDIBUS Sept 11 Sept.. NP: Capitolium 507 BCE. Epulum of Jupiter, Juno, and Minerva. Hammering of the Nail in the lintel of the cella of Minerva on the Capitolium.
14 XIX Kal Oct 12 Sept. F: Procession of the Equites.
15 XVIII Kal Oct 13 Sept. N: Ludi Romani
16 XVII Kal Oct. 14 Sept C: Etesian winds (of Summer) cease to blow.
17 XVI Kal Oct. 15 Sept N: Ludi Romani (extended by Julius Caesar)
18 XV Kal Oct. 16 Sept. C: Constatine defeated Licinius at Chrysopolis, 324 CE.
19 XIV Kal Oct. 17 Sept. C: Ludi Romani (Last day of Caesarian Ludi)
20 XIII Kal Oct. 18 Sept. C: Death of Alexander, 356 BCE.
21 XII Kal Oct. 19 Sept. C: Commissura Pisces disappears.
22 XI Kal oct. 20 Sept. C: Mercatus (Last market day following Ludi Romani)
23 X Kal Oct. 21 Sept.C: Juno Regina in the Circus Flaminius; Jupiter Stator; Latona in the Theater of Marcellus; Felicitatus in the Campus Martius. Birth of Octavius, 63 BCE.
24 IX Kal Oct. 22 Sept.C: The Ancients were of the opinion that the vintage is never ripe before the equinox (Pliny 18.74)
25 VIII Kal Oct. 23 Sept C: Autumnal Equinox 6:47 AM
26 VII Kal Oct. 24 Sept. C: Venus Genetrix in the Forum of Caesar, 45 BCE.
27 VI Kal Oct. 25 Sept. C: Never gather the grape in a heated state...
28 V Kal Oct. 26 Sept C: when the weather is dry, before the rains fallen
29 IV Kal Oct. 27 Sept C: nor ought it to be gathered when dew covered
30 III Kal Oct. 28 Sept. C: nor yet before the dews are dispelled by the sun (Pliny)