Allow me to introduce you to the French Revolutionary calendar!! Each day had 10 hours, each hour had 100 minutes, and each minute had 100 seconds (for a total of 100,000 decimal seconds per day).
Each week was ten days long. There were twelve months, each of which were 3 weeks long. The five or six remaining days were "complementary days", and were tacked on to the end of the year. The complementary days weren't part of any month or week, and were national holidays.