We are all used to the notion of 24 hours in a day, 7 days in a week, 4 and a bit weeks in a month and 12 months in a year. However, what if we went decimal? I would keep the 24 hours in a day I don't think my body clock could cope with anything different. A week would be 10 days long. A month would be 10 weeks long. And a year would be 10 months long. Therefore a year would be 1000 days long.