I can’t say “don’t try this at home, folks”, so; Let me emphasize that, before you start wiggling your butt naked to your neighbor or start sticking your rear-end through the window of your car.
These words are all based on old English language; with more detail below …
Monday : Mōnandæg (pronounced [mon.nan.dæg] or [mon.nan.dæj’])
Essentially meaning “moon’s day”. This is likely based on a translation of the Latin name dies lunae.
In North Germanic mythology, the moon is personified as a god, Máni.
Tuesday : Tīwesdæg (pronounced [ti.wes.dæg] or [ti.wes.dæj]
Meaning “Tiw’s day.” Tiw (Norse Týr) which 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 based on Latin dies Martis, “Day of Mars” (the Roman war god); compare: French mardi, Spanish martes, Romanian marţi, Italian martedì and Irish mairt.
Wednesday : Wōdnesdæg (pronounced [woːd.nes.dæg] or [woːd.nes.dæj)
Meaning the day of the Germanic god Wodan (later 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.
It is based on Latin dies Mercurii, “Day of Mercury”; compare: French mercredi, Spanish miércoles, Romanian miercuri and Italian mercoledì. The connection between Mercury and Odin is more strained than the other syncretic connections. The usual explanation is that both Wodan and Mercury were considered psychopomps, or leaders of souls, in their respective mythologies; both are also associated with poetic and musical inspiration. The Icelandic Miðviku, German Mittwoch and Finnish keskiviikko all mean ‘mid-week’.
Thursday : Þūnresdæg (pronounced [θuːn.res.dæg] or [θuːn.res.dæj])
Meaning the Þunor’s day. Þunor is commonly known in Modern English as Thor, the god of thunder in Germanic Paganism. Old High German’s name for Þunor, Donar, leads to Donnerstag. (The modern German word for “thunder” is still Donner.)
The Scandinavian “Torsdag” literally means “Thor’s day”. The day is based on the Latin dies Iovis, “day of Jupiter”; compare: French jeudi, Spanish jueves, Romanian joi and Italian giovedì. In the Roman pantheon, Jupiter was the chief god, who seized and maintained his power on the basis of his thunderbolt (Fulmen).
Friday: Old English Frīgedæg (pronounced [fri.je.dæg] or [fri.je.dæj])
Meaning the day of the Norse goddess Fríge. The Norse name for the planet Venus was Friggjarstjarna, ‘Frigg’s star’. It is based on the Latin dies Veneris, “Day of Venus”; compare: French vendredi, Spanish viernes, Romanian vineri and Italian venerdì. Venus was the Roman goddess of beauty, love and sex.
Saturday: the only day of the week to retain its Roman origin in English
Its original Anglo-Saxon rendering was Sæturnesdæg (pronounced [sæ.tur.nes.dæg] or [sæ.tur.nes.dæj]). Named after the Roman god Saturn associated with the Titan Cronus, father of Zeus and many Olympians.
In Latin it was dies Saturni, “Day of Saturn”. The Spanish and Portuguese sábado, the Romanian sâmbătă, the French samedi, and the Italian sabato come from Sabbata dies or “dies Sabbati” (Day of the Sabbath).
The Scandinavian Lørdag/Lördag deviates significantly as it has no reference to the old Norse gods, the Latin gods nor the roman gods. It derives from old Norse laugardagr, which literally translates to washing-day.
Sunday: Old English Sunnandæg (pronounced [sun.nan.dæg] or [sun.nan.dæj),
Meaning “sun’s day”; This is a translation of the Latin phrase dies Solis. English, like most of the Germanic languages, preserves the original pagan/sun associations of the day. 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).
Compare: Spanish and Portuguese domingo, French dimanche, Romanian duminică, Italian domenica and Irish domhnach. In both West Germanic and North Germanic mythology the sun is personified as a goddess, Sunna/Sól.
For more information; I suggest you to go to : http://en.wikipedia.org/wiki/Days_of_the_week 😉
Have a nice day!