The following season didn't go so well for the Capital region recording losses to Leicester in the Heinken Cup and Ospreys in the EDF Anglo Welsh Cup semi final.
However, the 2008/09 season was arguably the most memorable one, with the Blues recording a win over Gloucester in the pool stage of the Heineken Cup in front of over 27,000 supporters.
They then recorded a hard fought win over Toulouse in the quarter-final in front of 36,000 supporters before facing Leicester in the semi final.
In front of a record 44,000 supporter the Blues fought back through tries from Jamie Roberts and Tom James and two touchline conversions from Ben Blair, to record a 26-26 draw, before missing out in a historic penalty shoot out.
For this weekend's match Blues season ticket holders are reminded that their tickets need to be collected from the Cardiff Arms Park Ticket Office before 4pm on Friday 29th March.
Season ticket holders wishing to renew their season ticket on the day of the double header can do so in the Martyn Williams Pack Bar situated behind the Family Stand.
The Gareth Edwards Lounge upstairs in the clubhouse will be open to the general public from 12 midday, with the downstairs Members Bar also opening at 12.
It's the ideal venue to meet ahead of the matches on Easter Saturday (March 30) with the Newport Gwent Dragons kicking off against the Scarlets at 2.30pm.
Speaking ahead of the match Cardiff Blues flanker Sam Warburton said, "I'm looking ahead to Judgment Day in the Stadium. Hopefully people will turn up who have the bug from the Six Nations and want to watch two great clashes.
"There was some good banter flying around when we were in the national squad. We had photo shoots for it while in the Welsh camp, head to head shoots with me and Justin, so we had a bit of a laugh with it.
"We are all looking forward to it and hopefully the fans will feel the same way too.
"I guess now with the hype of the Six Nations this is when kids get inspired to play and I think it's great for the players to get out in the community and meet the kids, which is what we are doing with the Blues at the start of April.
"Hopefully it will inspire them to pick up a ball and keep playing. I think it is important for us to capitalise on events like the Six Nations and success to increase participation."
Tickets for the matches are available priced at Adults £25, U18s £10, Family ticket £50 (two adults, two children) Tickets available from wru.co.uk/tickets
Cardiff Blues in the Millennium Stadium
Cardiff Blues 40 - 31 Leinster Rugby Sunday 14th May 2006, KO 18:10
Att: 15,327 Magners League
Cardiff Blues 17 - 21 Leicester Tigers Sunday 29th October 2006, KO 15:00
Att: 26,645 Heineken Cup Pool Match
Cardiff Blues 10 - 27 Ospreys Saturday 24th March 2007, KO 17:15
Att: 40,057 EDF Energy Cup Semi Final
Cardiff Blues 37 - 24 Gloucester Rugby Sunday 19th October 2008, KO 15:00
Att 27,114 Heineken Cup Pool Match
Cardiff Blues 9 - 6 Toulouse Saturday 11 April 2009, KO 15:30
Att: 36,728 Heineken Cup Quarter Final
Cardiff Blues 26 - 26 Leicester Tigers Sunday 3 May KO 15:00
Att 44,212 Heineken Cup Semi Final