from Spanish mañana, "tomorrow," from cras manñana, literally "tomorrow early," from Vulgar Latin *maneana "early," from Latin mane "in the morning," from PIE *ma- "good," with notion of "occurring at a good time, timely, early" (compare matins; and see mature (v.)). "Often taken as a synonym of easy-going procrastination said to be found in Spanish-speaking countries" [OED].
