I don't think SUT fits its own motivation: instead of comparing time zones (for which numerous apps already exist), I have to compare local working times (for w

I don't think SUT fits its own motivation: instead of comparing time zones (for which numerous apps already exist), I have to compare local working times (for which no apps exist ;-). Further, having seconds, minutes as multiples of 10 only makes very few things easier. Or when was the last time you had to find out how many hours are in 1234567 seconds? Did you have to do that more often than finding out how many months are in 1234567 hours? Last, it totally ignores the concept of leap seconds.