I'm afraid I don't know the KO yet, Mo. The official Emirates FA Cup website isn't being terribly helpful. It says Saturday 11th March which could well be a lie.
http://www.thefa.com/competitions/th...up-round-dates
The BBC, who I gather are one of the television companies who show the matches and so get to know first which inconvenient-for-supporters date-and-time it will be says that it will be at 1500 on Saturday 11th March. they could be lying too, I suppose, especially as they also say that
Please note: All times UK. Fixtures are subject to change. The BBC is not responsible for any changes that may be made.
http://www.bbc.co.uk/sport/football/fa-cup/fixtures
The BT website also says saturday 11th March, but admit that they don't know the kick-off times yet as they are 'TBC'.
http://sport.bt.com/football/fa-cup/...01364045940012
So from the three main sources of information, the game is most likely to be on the Saturday at 3.00pm, even though you, I and the other 10 people that use this website and have no insider information about scheduled times know damned well that the one time that the match will definitely not be, is 3.00pm on Saturday 11th March.
It's a funny old world.