Right? Even the symbol for it is water! How is this not a water sign but Scorpio is?! I don't understaaaaaand.
As to how long I've been working on them - probably not as long as you'd guess. Once I made the decision to do them, a time crunch was on because there was a hard end date of March 30th, and I needed to make sure there was enough lead time to get them printed. Add that to the fact that with this kind of project it's either do all of them or do none of them because you don't want to run the risk of not having the one someone's looking for, and it all got thrown together VERY quickly. I trimmed the fat wherever I could for the sake of time - simplistic backgrounds, single-pass inking, only one layer of shading, no highlighting - while still maintaining the look of a completed piece, but it was still a monumental effort that actually meant a few late nights and rushed comic pages to make time for it.
...and under those particular circumstances, they turned out WAY better than I ever could've expected, so I'm happy.
(...though the original plan was digital paintings which would have looked far better, so throw that into the "what could have been" pile