Fixing a Small Calc.exe Bug

Actually, the exact case in the post “July 31st – December 31st” did actually give the correct result of “5 months” on my machine. But testing around a bit I found that on my machine “July 31st – December 30th” actually causes the bug. I put fix in quotes because it then results in the following result:

Which I guess is technically correct if you concede that “July 31st + 4 Months = November 30th”.

Source: www.petertissen.de