Not a pro, but I did a little searching trying to find out for ya...
Seems like the "DK" in your model indicates it's a 2007 or newer.
Also looks like Honda stopped indicating years in the model number in 2007, so "DK" will cover lots of years from 2007 on.
If you're looking for parts, then you can use your serial number to look up appropriate parts and find what you need..
If however you're looking for the year specifically (for registration, title, bill of sale etc.. if required in your state) then most of what I've found says to call a dealer and give them the model and serial and maybe they can look it up..
Perhaps somebody else here with access to the same info a dealer may have can let you know for sure, but that's the best info I found on it...
Hope it helps!