There is no such thing in anyone's life as an unimportant day.

Woollcott’s line rejects the habit of dismissing ordinary time as disposable. It suggests that every day—however routine, disappointing, or uneventful it seems—carries consequences: it shapes character through small choices, alters relationships through attention or neglect, and accumulates into the narrative of a life. The aphorism also works as a moral prod against procrastination and self-pity, implying that meaning is not reserved for milestones but is made (or missed) in the daily. In Woollcott’s typically epigrammatic manner, the sentence compresses a philosophy of vigilance: treat each day as significant because it is irrecoverable and formative.