TypeScript - subtract years from date

In this article, we would like to show you how to subtract years from date in TypeScript.

Quick solution:

const date: Date = new Date('2021-06-30');

date.setFullYear(date.getFullYear() - 2); // subtracted 2 years from existing date

console.log(date.toISOString()); // 2019-06-30T00:00:00.000Z

Example reusable lambda function

In this example, we create a simple lambda function that takes two arguments:

• date from which we want to subtract some years,
• years - a number of years we want to subtract.

Practical example:

const subtractYears = (date: Date, years: number): Date => {
  const result = new Date(date);
  result.setFullYear(result.getFullYear() - years);
  return result;
};


// Usage example:

const date: Date = new Date('2021-06-30');
const newDate = subtractYears(date, 2); // subtracted 2 years from existing date

console.log(newDate.toISOString()); // 2019-06-30T00:00:00.000Z

Output:

2019-06-30T00:00:00.000Z