Names of the week and month

Names of the week

https://en.wikipedia.org/wiki/Names_of_the_days_of_the_week

Greco-Roman tradition

Day	Sunday Sōl or Helios (Sun)	Monday Luna or Selene (Moon)	Tuesday Mars or Ares (Mars)	Wednesday Mercurius or Hermes (Mercury)	Thursday Jove or Zeus (Jupiter)	Friday Venus or Aphrodite (Venus)	Saturday Saturnus or Kronos (Saturn)
Greek	ἡμέρᾱ Ἡλίου (Ἀπόλλωνος) hēmérā Hēlíou (Apóllōnos) Ἡλιαίᾱ Hēliaíā Ἀπολλωνίᾱ Apollōníā	ἡμέρᾱ Σελήνης (Ἀρτέμιδος) hēmérā Selḗnēs (Artémidos) Σεληνίᾱ Selēníā (Ἀρτεμιτίᾱ) (Artemitíā)	ἡμέρᾱ Ἄρεως hēmérā Áreōs Ἀρείᾱ Areíā	ἡμέρᾱ Ἑρμοῦ hēmérā Hermoû Ἑρμ(ε)ίᾱ Herm(e)íā	ἡμέρᾱ Διός hēmérā Diós Διώνη Diṓnē	ἡμέρᾱ Ἀφροδῑ́της hēmérā Aphrodī́tēs Ἀφροδιτίᾱ Aphroditíā	ἡμέρᾱ Κρόνου hēmérā Krónou Κρονίᾱ Kroníā
Latin	diēs Sōlis	diēs Lūnae	diēs Mārtis	diēs Mercuriī	diēs Iovis	diēs Veneris	diēs Sāturnī

Germanic tradition

The Germanic peoples adapted the system introduced by the Romans by substituting the Germanic deities for the Roman ones (with the exception of Saturday) in a process known as interpretatio germanica. The date of the introduction of this system is not known exactly, but it must have happened later than AD 200 but before the introduction of Christianity during the 6th to 7th centuries, i.e., during the final phase or soon after the collapse of the Western Roman Empire.[17] This period is later than the Common Germanic stage, but still during the phase of undifferentiated West Germanic. The names of the days of the week in North Germanic languages were not calqued from Latin directly, but taken from the West Germanic names.

• Sunday: Old English Sunnandæg (pronounced [ˈsunnɑndæj]), meaning "sun's day". This is a translation of the Latin phrase diēs Sōlis. English, like most of the Germanic languages, preserves the day's association with the sun. Many other European languages, including all of the Romance languages, have changed its name to the equivalent of "the Lord's day" (based on Ecclesiastical Latin dies Dominica). In both West Germanic and North Germanic mythology, the Sun is personified as Sunna/Sól.
• Monday: Old English Mōnandæg (pronounced [ˈmoːnɑndæj]), meaning "Moon's day". This is equivalent to the Latin name diēs Lūnae. In North Germanic mythology, the Moon is personified as Máni.
• Tuesday: Old English Tīwesdæg (pronounced [ˈtiːwezdæj]), meaning "Tiw's day". Tiw (Norse Týr) was a one-handed god associated with single combat and pledges in Norse mythology and also attested prominently in wider Germanic paganism. The name of the day is also related to the Latin name diēs Mārtis, "Day of Mars" (the Roman god of war).
• Wednesday: Old English Wōdnesdæg (pronounced [ˈwoːdnezdæj]) meaning the day of the Germanic god Woden (known as Óðinn among the North Germanic peoples), and a prominent god of the Anglo-Saxons (and other Germanic peoples) in England until about the seventh century. This corresponds to the Latin counterpart diēs Mercuriī, "Day of Mercury", as both are deities of magic and knowledge. The German Mittwoch, the Low German Middeweek, the miðviku- in Icelandic miðvikudagur and the Finnish keskiviikko all mean "mid-week".
• Thursday: Old English Þūnresdæg (pronounced [ˈθuːnrezdæj]), meaning 'Þunor's day'. Þunor means thunder or its personification, the Norse god known in Modern English as Thor. Similarly Dutch donderdag, German Donnerstag ('thunder's day'), Finnish torstai, and Scandinavian torsdag ('Thor's day'). "Thor's day" corresponds to Latin diēs Iovis, "day of Jupiter" (the Roman god of thunder).
• Friday: Old English Frīgedæg (pronounced [ˈfriːjedæj]), meaning the day of the Anglo-Saxon goddess Fríge. The Norse name for the planet Venus was Friggjarstjarna, 'Frigg's star'. It is based on the Latin diēs Veneris, "Day of Venus".
• Saturday: named after the Roman god Saturn associated with the Titan Cronus, father of Zeus and many Olympians. Its original Anglo-Saxon rendering was Sæturnesdæg (pronounced [ˈsæturnezdæj]). In Latin, it was diēs Sāturnī, "Day of Saturn". The Nordic laugardagur, leygardagur, laurdag, etc. deviate significantly as they have no reference to either the Norse or the Roman pantheon; they derive from Old Nordic laugardagr, literally "washing-day". The German Sonnabend (mainly used in northern and eastern Germany) and the Low German Sünnavend mean "Sunday Eve"; the German word Samstag derives from the name for Shabbat.

Names of the month

https://en.wikipedia.org/wiki/Roman_calendar

Roman Republican calendar (c. 700 BC or c. 450 BC – 46 BC)

English			Latin			Meaning		Length in days
								1st year (cmn.)	2nd year (leap)	3rd year (cmn.)	4th year (leap)
1.	January		I.	Mensis Ianuarius		Month of Janus		29	29	29	29
2.	February		II.	Mensis Februarius		Month of the Februa		28	23	28	24
		Intercalary Month			Intercalaris Mensis (Mercedonius)		Month of Wages		27		27
3.	March		III.	Mensis Martius		Month of Mars		31	31	31	31
4.	April		IV.	Mensis Aprilis		Month of Aphrodite – from which the Etruscan Apru might have been derived		29	29	29	29
5.	May		V.	Mensis Maius		Month of Maia		31	31	31	31
6.	June		VI.	Mensis Iunius		Month of Juno		29	29	29	29
7.	July		VII.	Mensis Quintilis		Fifth Month (from the earlier calendar starting in March)		31	31	31	31
8.	August		VIII.	Mensis Sextilis		Sixth Month		29	29	29	29
9.	September		IX.	Mensis September		Seventh Month		29	29	29	29
10.	October		X.	Mensis October		Eighth Month		31	31	31	31
11.	November		XI.	Mensis November		Ninth Month		29	29	29	29
12.	December		XII.	Mensis December		Tenth Month		29	29	29	29
Whole year:								355	377	355	378