JSFiddle - React, Tailwind, and code Playground

JavaScript

var myLine = "2015/01/05 12 John's mother.";
var dateType = /(\d{4})([\/-])(\d{1,2})\2(\d{1,2})/;
var isMatch = dateType.test(myLine);

if(isMatch){
    console.log('this contains a date');
}