Date Picker in Spanish

Hello,

I am calling the datetime field in a Repeater of OXygen builder. It displays the date in English.
And the wordpress is set to spanish.

The id of the custom field of the date is: "fecha_del_evento"

I added a code snippet (a s I saw in the forum):
$date = get_post_meta( get_the_ID(), 'fecha_del_evento', true );
echo date_i18n( 'F j, Y', $date );

It doesnt change anytihng

thanks for the help