Date back for 10 years

In JS, this can all be done simply using the Date object.

A simple example:

var now = new Date(); var newDate = new Date(); newDate.setFullYear(now.getFullYear() - 10); 

And then you refer to the date methods and take the data that you need, the list of methods is available from the link above, here are some of them:

 getDate() Returns the day of the month (from 1-31) getDay() Returns the day of the week (from 0-6) getFullYear() Returns the year (four digits) getHours() Returns the hour (from 0-23) getMilliseconds() Returns the milliseconds (from 0-999) getMinutes() Returns the minutes (from 0-59) getMonth() Returns the month (from 0-11) getSeconds() Returns the seconds (from 0-59) 

Just keep in mind that some methods return data counting from 0, not 1, the same getHours or getMonth method, so to add the correct number, add another 1.

To manipulate the year:

• Date.prototype.getFullYear
• Date.prototype.setYear

To display localized data ("in English"):

• toLocaleString

Another way to format dates that are more productive if you need to work with a variety of dates is to compile the format in advance using:

• Intl.DateTimeFormat

 var locale = 'en-US'; var d = new Date; d.setYear(d.getFullYear() - 10); console.log(d.toLocaleDateString(locale)); console.log(d.toLocaleTimeString(locale)); console.log(d.toLocaleString(locale, {weekday: 'long'})) var options = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' }; var dateTimeFormat = new Intl.DateTimeFormat(locale, options); console.log(dateTimeFormat.format(d));