--- title: quarterOfYear tags: date,beginner firstSeen: 2020-10-09T10:23:55+03:00 lastUpdated: 2020-10-22T20:24:04+03:00 --- Returns the quarter and year to which the supplied date belongs to. - Use `Date.prototype.getMonth()` to get the current month in the range (0, 11), add `1` to map it to the range (1, 12). - Use `Math.ceil()` and divide the month by `3` to get the current quarter. - Use `Date.prototype.getFullYear()` to get the year from the given `date`. - Omit the argument, `date`, to use the current date by default. ```js const quarterOfYear = (date = new Date()) => [ Math.ceil((date.getMonth() + 1) / 3), date.getFullYear() ]; ``` ```js quarterOfYear(new Date('07/10/2018')); // [ 3, 2018 ] quarterOfYear(); // [ 4, 2020 ] ```