Date functions for pt-br systems

date.js

function isDiaMesAno(dd_mm_yyyy) {
  var matches = String(dd_mm_yyyy).trim().match(/^(\d{1,2})\/(\d{1,2})\/(\d{4})$/)
  var date = matches && new Date(matches[3], matches[2] - 1, matches[1]);
  return !!(date && (date.getMonth() + 1) == matches[2]);
}

function isHoraMinuto(hh_mm) {
  var matches = String(hh_mm).trim().match(/^(\d{2}):(\d{2})$/)
  var date = matches && new Date(2017, 0, 1, matches[1], matches[2]);
  return !!(date && date.getHours() == matches[1]);
}

function diaMesAnoAtual() {
  var date = new Date();
  var dd = date.getDate();
  var mm = date.getMonth() + 1;
  var aaaa = date.getFullYear();
  return (dd < 2 ? '0' + dd : dd) + '/' + (mm < 2 ? '0' + mm : mm) + '/' + aaaa;
}

function horaMinutoAtual() {
  var date = new Date();
  var hh = date.getHours();
  var mm = date.getMinutes();
  return (hh < 2 ? '0' + hh : hh) + ':' + (mm < 2 ? '0' + mm : mm);
}