Old English Easterdæg, from Eastre (Northumbrian Eostre), from Proto-Germanic *austron-, "dawn," also the name of a goddess of fertility and spring, perhaps originally of sunrise, whose feast was celebrated at the spring equinox, from *aust- "east, toward the sunrise" (compare east), from PIE root *aus- (1) "to shine," especially of the dawn.
Bede says Anglo-Saxon Christians adopted her name and many of the celebratory practices for their Mass of Christ's resurrection. Almost all neighboring languages use a variant of Latin Pascha to name this holiday (see paschal).
Easter egg is attested by 1825, earlier pace egg (1610s). Easter bunny is attested by 1904 in children's lessons; Easter rabbit is by 1888; the paganish customs of Easter seem to have grown popular c. 1900; before that they were limited to German immigrants.
If the children have no garden, they make nests in the wood-shed, barn, or house. They gather colored flowers for the rabbit to eat, that it may lay colored eggs. If there be a garden, the eggs are hidden singly in the green grass, box-wood, or elsewhere. On Easter Sunday morning they whistle for the rabbit, and the children imagine that they see him jump the fence. After church, on Easter Sunday morning, they hunt the eggs, and in the afternoon the boys go out in the meadows and crack eggs or play with them like marbles. Or sometimes children are invited to a neighbor's to hunt eggs. [Phebe Earle Gibbons, "Pennsylvania Dutch," Philadelphia 1882]
Perhaps based on Apru, an Etruscan borrowing of Greek Aphrodite. Or perhaps *ap(e)rilis "the following, the next," from its place as the second month of the old Roman calendar, from Proto-Italic *ap(e)ro-, from PIE *apo- "away, off" (see apo-; compare Sanskrit aparah "second," Gothic afar "after"). Old folk etymology connected it with Latin aperire "to open."
In English in Latin form from mid-12c.; it replaced Old English Eastermonað, which was named for a fertility goddess (see Easter). Re-spelled in Middle English on Latin model (apprile, first attested late 14c.).
Old English Pentecosten "Christian festival on seventh Sunday after Easter," from Late Latin pentecoste, from Greek pentekostē (hēmera) "fiftieth (day)," fem. of pentekostos, from pentekonta "fifty," from pente "five" (from PIE root *penkwe- "five"). The Hellenic name for the Old Testament Feast of Weeks, a Jewish harvest festival observed on 50th day of the Omer (see Leviticus xxiii.16).
U.S. state, formerly a Spanish colony, probably from Spanish Pascua florida, literally "flowering Easter," a Spanish name for Palm Sunday, and so named because the peninsula was discovered on that day (March 20, 1513) by the expedition of Spanish explorer Ponce de León. From Latin floridus "flowery, in bloom" (see florid). Related: Floridian (1580s as a noun, in reference to the natives; 1819 as an adjective).
second day of the week, Middle English monedai, from Old English mōndæg, contraction of mōnandæg "Monday," literally "day of the moon," from mona (genitive monan; see moon (n.)) + dæg (see day). A common Germanic name (compare Old Norse manandagr, Old Frisian monendei, Dutch maandag, German Montag). All are loan-translations of Late Latin Lunæ dies, which also is the source of the day name in Romance languages (French lundi, Italian lunedi, Spanish lunes), itself a loan-translation of Greek Selēnēs hēmera. The name for this day in Slavic tongues generally means "day after Sunday."
Yf cristemas day on A munday be,
Grete wynter þat yere ye shull see.
[proverb, c. 1500]
Phrase Monday morning quarterback is attested from 1932, Monday being the first day back at work after the weekend, where school and college football games played over the weekend were discussed. Black Monday (late 14c.) is the Monday after Easter day, though how it got its reputation for bad luck is a mystery (none of the usual explanation stories holds water). Saint Monday (1753) was "used with reference to the practice among workmen of being idle Monday, as a consequence of drunkenness on the Sunday" before [OED]. Clergymen, meanwhile, when indisposed complained of feeling Mondayish (1804) in reference to effects of Sunday's labors.