10.04.24: reading the month and the year

Image #1

Mēnse Iānuāriō │ Annō [ablative] 1654

In the month of January │ in the year 1654

Or: Mēnse Iānuāriō │ Annī [genitive] 1654

In the month of January │ of the year 1654

Image #2

Concerning the observations of a comet at Ingolstadt:

MĒNSE DECEMBRĪ │ ANNĪ M.DC.LXIV

In the month of December │ of the year 1664

IANVARIŌ ITEM AC FEBRVĀRIŌ │ ANNĪ M.DC.LXV

Likewise in January and (in) February │ of the year 1665

Image #3: from the same work as #2 above

MĒNSE APRĪLĪ │ DIĒ XXIX

In the month of April │ on the 29th day [XX 20 + IX 9]

And, in very small print at the bottom:

ANNŌ M.DC.LXV

In the year 1665

M: 1000

D: 500

C: 100

L: 50

V: 5

M 1000 │ + D 500 + C 100 │ + │ L 50 + X 10 │ + │ V 5 = 1665