Sundae
来自Big Physics
late 19th century (originally US): perhaps an alteration of Sunday, either because the dish was made with ice cream left over from Sunday and sold cheaply on the Monday, or because it was sold only on Sundays, a practice devised (according to some accounts) to circumvent Sunday legislation.
wiktionary
Modification of Sunday.
sundae ( uncountable)
etymonline
sundae (n.)
1897, American English, thought to be an alteration of Sunday, perhaps re-spelled in deference to religious feelings; but the reason for the name is uncertain; perhaps "ice cream left over from Sunday, on sale later." For a fuller account of the speculations, see H.L. Mencken, "The American Language," Supplement I (1945), pp.376-7.
