$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL,'https://api.direct.yandex.ru/live/v4/json/');
	curl_setopt($ch, CURLOPT_POST, 1);
	curl_setopt($ch, CURLOPT_POSTFIELDS,'{
	   "method": "AccountManagement",
	   "token": "AQAAAAAW-*******************************",
	   "param": {"SelectionCriteria": {}, "Action": "Get"}}');  //Post Fields
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	$headers = [
		'POST /json/v5/ads/ HTTP/1.1',
		'Host: api.direct.yandex.com',
		'Authorization: Bearer AQAAAAAW-**********************************',
		'Accept-Language: ru',
		'Client-Login:  *************@yandex.ru',
		'Content-Type: application/json; charset=utf-8',
	];
	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
	$server_output = curl_exec ($ch);
	curl_close ($ch);
	$balance_direct_miramall = json_decode($server_output,true);

<div class="calculator_table">
  <select id="calc-month">
    <option value="0">January</option>
    <option value="1">February</option>
    <option value="2">March</option>
    <option value="3">April</option>
    <option value="4">May</option>
    <option value="5">June</option>
    <option value="6">July</option>
    <option value="7">August</option>
    <option value="8">September</option>
    <option value="9">October</option>
    <option value="10">November</option>
    <option value="11">December</option>
  </select>

  <select id="calc-day"></select>
  <select id="calc-year"></select>

  <p align="center"><button onclick="calculate();return false;">Calculate</button></p>
  <div id="results"></div>
</div>

<script>
  window.onload = function() 
  {
	var npw = new Date();
	var g = npw.getFullYear();
	var m = npw.getMonth();
	var da = npw.getDate();
	
    for (var y = 2014; y < 2050; y++ )
    {
		document.getElementById('calc-year').innerHTML += '<option value="'+y+'">' + y +'</option>'; 	
    }

    for (var d = 1; d <= 31; d++ )
    {
      document.getElementById('calc-day').innerHTML += '<option value="'+d+'">' + d +'</option>'; 
    }
	document.getElementById('calc-year').value=g;
	document.getElementById('calc-month').value=m;
	document.getElementById('calc-day').value=da;
  }

  function calculate()
  {
    var monthNames = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
    var day = Number(document.getElementById('calc-day').value);
    var month = Number(document.getElementById('calc-month').value);
    var year = Number(document.getElementById('calc-year').value);
    var nextday = day + 280;
    var initial = new Date(Date.UTC( year, month, day, 0, 0, 0));
    var predicted = new Date(Date.UTC( year, month, nextday, 0, 0, 0));
    var now = new Date();

    var formated = monthNames[predicted.getMonth()] + ' ' + predicted.getDate() + ', ' + predicted.getFullYear();
    var leftDays =  ( predicted.getTime() - now.getTime() ) / (24*3600*1000); 
    var currentWeeks = (now.getTime() - initial.getTime()) / (7*24*3600*1000)
    document.getElementById('results').innerHTML = '<p>Your estimated due date is ' + formated + '</p><p>Days left to your date: '+ parseInt(leftDays) +'</p><p>Weeks of pregnancy: '+ Math.round(currentWeeks) +'</p>';
  }
</script>