On Monday, Dali updated their official blog, posting an image of the number 10. Every day since then, the band has been [counting down][1] with similar posts...
The countdown will reach 0 on May 3rd, the date of UNDER CODE PRODUCTION's grand finale and dismantling. Dali will appear at that event and officially, officially, disband, so it's likely that the countdown is in regards to that dismandment/dismantling. But, who knows?, it could be counting down to something good... What do you think?
[1]: http://ameblo.jp/dali-official/entry-11516862714.html "10"