saetia

<?php
function is_federal_holiday(DateTime $date){
	$year = $date->format('Y');
	$federal_holidays = array_map(function($date_string) use($year){
		$date = new DateTime($date_string . ' ' . $year);
		if ($date->format('l') === 'Saturday') $date->modify('-1 day');
		if ($date->format('l') === 'Sunday') $date->modify('+1 day');
		return $date;
	}, [
		"january 1",                    //new year's day