People without a religious affiliation, in modern lingo

• Roman times
• 1951 book of Auden poems
• Roman calendar date
• The fifth of the seven canonical hours
• Ides' counterpart
• Roman-calendar day
• Afternoon prayers
• The ninth day before the ides

Wiktionary Word definitions in Wiktionary
n. 1 In the http://en.wikipedia.org/wiki/Roman%20calendar the eighth day ('''ninth''' counting inclusively) before the ides of a month. 2 Midday, or the meal eaten at midday. 3 The liturgy said at midday. 4 Those without a religious affiliation.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
early 15c., in reference to the Roman calendar, "ninth day (by inclusive reckoning) before the ides of each month" (7th of March, May, July, October, 5th of other months), from Latin nonæ (accusative nonas ), fem. plural of nonus "ninth." Ecclesiastical ...