This is not a HP Unix forum. Under Linux you could use Bash for string tasks, but under HP Unix? Perhaps you can use a more general approach, such as data=`echo "0112011" | cut -c1-2`, for example, and construct your desired date format.
Your question is outside the scope of this Linux forum space, and is locked.
You seem to hope for assistance with a specific Unix that is a product from a specific company.
I suggest you go to that company's forum community and ask there. You will undoubtedly find many people there that are familiar with the nuances if that OS.