This section is from the book "Bepler's Handy Manual of Knowledge And Useful Infomation", by David Bepler. Also available from Amazon: Bepler's Handy Manual of Knowledge and Useful Information.
January. - The Roman Janus presided over the beginning of everything; so the first month was named after him.
February. - The Roman festival Februs was held on the fifteenth day of this month, in honor of Lupercus.
March. - Named after the Roman's god of war - Mars.
April. - From the Latin, Aprilis, derived probably from asperire, to open, because spring-time generally commences and the buds burst open in this month.
May. - Latin, Maius, derived probably from Maia, a feminine divinity worshiped at Rome on the first day of this month.
June. - Juno, a Roman divinity worshiped as the Queen of Heaven.
July. - Julius, Julius Caesar was born in this month.
August. - Named by the Roman Emperor, Augustus Caesar, after himself, as he regarded it a lucky month, being the month in which he won several of his famous victories.
September. - Septem, the Latin for seven; September was the seventh month in the old Roman year.
October. - Octo, the Latin for eight, it was the eighth month in the old Roman year.
November. - Novem, the Latin for nine, it was the ninth month in the old Roman year.
December. - Decern, the Latin for ten, it being the tenth month in the old Roman year.
The Origin of the Names of the Days
Sunday. - It was so-called because it was anciently dedicated to the worship of the sun.
Monday. - Means literally, the day of the Moon.
Tuesday. - Was dedicated to Tuisco, the Mars of our Saxon Ancestors, the deity or god that presided over wars, combats, strife and litigation.
Wednesday. - It's so-called from Wodin or Odin, a deity or chief among ancient nations of Northern Europe.
Thursday. - It is named after Thor, the old Teutonic god of Thunder.
Friday. - Is named from Frea or Friga, a goddess of the old Saxon mythology.
Saturday. - Means simply Saturn's day, the name being derived from the deity of that name.