Origins of months and days

January - Named after roman god of beginnings and endings.
February - The name comes from either the old Italy god or else from februa, signifying the festivals of purification celebrated in rome during this month.
March - This is the first month of the roman year. It is named after the roman god of war.
April - Called Aprilis, from aperire, 'to open'. Possible because it is the month in which the buds begin to open.
May - The third month of the roman caledar. The name probably comes from the roman goddess on honor and reverence.
June - The fourth month was named in honor. However the name might also come from iuniores (young men; juniors) as opposed to maiores (grown men; majors) for May, the two months being dedicated to young and old men.
July - It was the month in which Julius caesar was born and named Julius in his honor in 44 bce, the year of his assassination. also called Quintilis (fifth month)
August - Originally this month was called sextilis (from sextus, six) but the name was late changed in honor of the forst of the roman emperors augustus (because several fortunate events of his life occurred during this month).
September - The name comes from septem, "seven"
October - The name comes from octo, "eight"
November - The name comes from novem, "nine"
December - The name comes from decem, "ten"

Sunday - the name comes from the latin dies solis, meaning "suns day"; the name of a pagan roman holiday. It is also called dominica (Latin), the day of god. the romance languages derived from the ancient latin language.
Monday - the name comes from the anglo-saxon monandaeg, the moons day. This second day was sacred to the goddess of the moon.
Tuesday - This day was named after the norse god. the romans named this day after after their war god Mars.
Wednesday - the day named to honor wodan. the romans called it dies mercurii after their god Mercury.
Thursday - The day named after the norse god thor. in the norse languages this day is calle torsdag. the romans named this day dies jovis after jupiter their most important god.
Friday - The day in honor of the norse goddess.
Saturday - This day was called dies saturni "saturns Day, by the acncient romans in honor of saturn.