<?php
$fecha = "2023-01-29";
$dias_semana_en = array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
$dias_semana_es = array("Domingo", "Lunes", "Martes", "Miércoles", "Jueves", "Viernes", "Sábado");
$dia_semana_en = date("l", strtotime($fecha));
$dia_semana_es = str_replace($dias_semana_en, $dias_semana_es, $dia_semana_en);
echo $dia_semana_es;
?>