Did you know that English tall case clocks use IIII instead of IV? How many times have you looked at a watch or clock and have seen IIII but didn’t question it? So, why the use of IIII and not IV? Well, English clocks have always used the Roman numeral system and there are different theories for the use of IIII. One long shot theory is that Roman sundials used IIII so as not to irritate Jupiter, God of Sky and Thunder, whose name in Latin was spelled IVPPITER. Another theory