datetimegrid.php

<?php
$date_plus_60_days = new DateTime("30-06-2017");
$date_plus_60_days->modify("+1 days");
$date_plus_60_days->modify("+3 days");
//echo $date_plus_60_days->format("D");


$d_leadtime = 3;

$date = "30/06/2014";
$pdate 		= str_replace('/','-',$date);

$date = new DateTime($pdate);	

$date->modify("-$d_leadtime days");

$ppdate = new DateTime('2014-06-25');


$limit = 30;

do {
	
	
	
	$d_weekday = strtolower($date->format("D"));
	$i = false;
	
	if ( $d_weekday == 'thu' && $d_weekday !='sun' )  {
		$i = true;
			do {
			$i2 = false;
			$limit --;
			$d_weekday = strtolower($date->format("D"));
			if ( $d_weekday == 'mon' && ($date > $ppdate) && $d_weekday !='sun' )  {
				$i2 = true;
			} else {
				$date->modify("+1 days");
			}
			
			if ( $limit == 0 ) {
						break;
			}
			
		} while($i2 == false );
		
	
		
		break;
	} else {
		$date->modify("-1 days");
	}
	
	
} while ($i == false);


echo $date->format("d-m-Y").'<br />';

$delivery_date = $date->modify("+$d_leadtime days");

do {
	$d_weekday = strtolower($delivery_date->format("D"));
	$find3 = false;
	if ( $d_weekday != 'sun' && $d_weekday == 'thu'  )  {
		$find3 = true;
		break;
	} else {
		$delivery_date->modify("+1 days");
	}
} while($find3 == false);

echo $delivery_date->format("d-m-Y").'<br />';