JSFiddle - React, Tailwind, and code Playground

JavaScript

var dob = new Date("04-01-1998");
  var spring2015min = new Date("09-01-1997");
  var spring2015max = new Date("08-31-1998");
  if (dob >= spring2015min && dob <= spring2015max){
    alert("Spring 2015");
  }