If I have an intention between midnight and dawn to make a long journey in the month of Ramadhan, should I begin fasting after dawn?

If the person intended before dawn to travel that day, and he travelled before zawal time (the time halfway between sunrise and sunset), it is permissible to break the fast during such a travel. If he did not break his fast during such a travel and came back before Zawal, he must renew the intention and continue the fast. If he did not intend at night to travel but intended after dawn to travel, he is not permitted to break his fast and his fast in valid.