On a good day, she looked almost unchanged from 1989 and 2003.
Long-term foreign assistance has a thin constituency on a good day.
Their top priority—the repeal of Obamacare over a certain presidential veto—looks impossible on a good day.
salutation, late 14c., short for have a good day (c.1200). Good morning is c.1400, gode morwene. Good night, also goodnight, is late 14c.; as an exclamation of surprise, from 1893.