How To Add or Subtract Days, Weeks, Months and Years to a Date in JavaScript with date-fns

// import isn't supported in Node v18.11.0 otherwise it would be // import { add, sub } from 'date-fns' const dateFns = require( "date-fns"); const { add, sub } = dateFns; // 31th of January 2023 const date = new Date(2023, 0, 31); console.log(date); console.log('Subtract 5 days, 2 months, 3 weeks and 7 years: ', sub(date, { days: 5, weeks: 3, months: 2, years: 7 })); console.log('Add 5 days, 2 months, 3 weeks and 7 years: ', add(date, { days: 5, weeks: 3, months: 2, years: 7 }));