Thanks for all the nice response!
I didn't know that it was a few minutes early - I calibrated the starting time against one of the online portal calculators.
Luckily the err is on the side of caution.
If someone can determine the exact amount it's off, I'll change it, but for now, I think I'll risk being early, rather than being late.
Perhaps I'll fix up the formatting errors and the other suggestions in the next few days. I threw the program together last evening, and it was in internal beta for about 5 minutes I believe
As to whether or not to ask permission - with all due respect, that is my decision (or perhaps mistake) to make. I believe that permission is needed for releasing anything that reads from or messes with internal game files, but not for a simple calculation tool like this.