JSFiddle - React, Tailwind, and code Playground

JavaScript

var birthdays = [
  {
    name: 'Mark',
    date: 'October 20'
  },
  {
    name: 'Robbin',
    date: 'December 5'
  }
];

var upcoming = birthdays.filter(function(person) {
  var date = new Date(person.date + ' 2015');
  
  return date > new Date();
});

console.log(upcoming);