There's no mention of a date and time being decided for the FA Cup match with Millwall on the Hull City website but Millwall are saying 15.00 05/01/18 https://www.millwallfc.co.uk/matche...9/january/millwall-vs-hull-city-on-05-jan-19/
HULL CITY’S EMIRATES FA CUP THIRD ROUND TIE WITH MILLWALL WILL BE PLAYED AT THE DEN ON SUNDAY 6TH JANUARY (KO 2PM). The game is being played on the Sunday as it has been chosen for live broadcast overseas. Ticket details will be confirmed in due course.
Millwall have announced their ticket prices for home fans (which will presumably be the away end prices too). Adults: £12 Over-61s: £6 Under-16s: £6