Lets not entirely forget that while 188 has been used so has 187. Now which do we consider to be 6 months. Half a year, by our calendar, is 187 1/2 days. Are we to drop the 1/2 and make it 187, or are we to carry the 1/2 over and it becomes 188? Or do both represent the exact same thing, namely 6 months?
Are you invoking Bagster and homicide, or are you a believer in the 375-day year?
Check Swordmaker's excellent "Q LexiQon"...
"187" is unequivocally the LEO code for "Homicide", Murder".