If you are departing from the U.S., you will need to arrange your flight to depart on October 12th and arrive in Rome Fiumicino Airport (FCO) on October 13th AT or BEFORE 6:10 PM.
If you are traveling from Medjugorje (or another place in Europe), you will depart on October 13th and arrange flight to arrive in Rome Fiumicino Airport (FCO) at or before 6:10 PM on October 13th.
*Same arrival times, different departure days - depending on location.