The date of Coventry City's re-arranged League One at Bristol City is not set in stone.
Tuesday February 4th, which has been agreed between both clubs after the game on the original date of January 4th was postponed, is also the date along with February 5th of the FA Cup Fourth Round replays.
If either City or Bristol City, who have a Third Round Replay at Watford next Wednesday, are involved in a Fourth Round Replay then the game will be postponed and a new date arranged.
Probably unlikely but you are advised not to book any transport until the FA Cup fates of both sides are known.