subQuarters
import { subQuarters } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// Subtract 3 quarters from 1 September 2014:
const result = subQuarters(new Date(2014, 8, 1), 3)
//=> Sun Dec 01 2013 00:00:00
function subQuarters<DateType extends Date>(date: DateType | number | string, amount: number): DateType;