/**
* Return the date of the first day in the month view grid.
*
* This is not necessarily the 1st of the specified month, rather it is the date of the
* first grid cell which could be anything upto 6 days earlier than the 1st of the month.
*
* @param string $month
* @param integer $start_of_week
*
* @return bool|string (Y-m-d)
*/
public static function calculate_first_cell_date($month, $start_of_week = null)
{
if (null === $start_of_week) {
$start_of_week = (int) get_option('start_of_week', 0);
}
$day_1 = Tribe__Date_Utils::first_day_in_month($month);
if ($day_1 < $start_of_week) {
$day_1 += 7;
}
$diff = $day_1 - $start_of_week;
if ($diff >= 0) {
$diff = "-{$diff}";
}
try {
$date = new DateTime($month);
$date = new DateTime($date->format('Y-m-01'));
$date->modify("{$diff} days");
return $date->format(Tribe__Date_Utils::DBDATEFORMAT);
} catch (Exception $e) {
return false;
}
}
