A crowd of between 50,000 and 60,000 is expected, with Swindon having sold over 28,000 tickets for their second trip to the new Wembley.
The game will kick off at 2pm, with the clocks going forward on Sunday morning. Wembley will be open from around 11.30 onwards, and tickets are still available from Wembley for any last minute fans, who have now found they are able to make it.
Swindon fans will be in the same end of the stadium as they were in 2010 for the Millwall game.
The Aldershot game which should have taken place this weekend will now be played on Tuesday 17th April.