Wiktionary
a day late and a dollar short
alt. (context US idiomatic English) Action that was taken too late and is too feeble to be of any use. n. (context US idiomatic English) Action that was taken too late and is too feeble to be of any use.
Wikipedia
A Day Late and a Dollar Short
A Day Late and a Dollar Short (novel)
A Day Late and a Dollar Short (2002) is Terry McMillan's fifth novel. It’s about a family in Las Vegas in 1994. Family charts in the end pages assist readers in keeping track of who is who in the large and dysfunctional Price family.