A new layout of our years should fulfil three criteria.

First of all simplicity. The units accepted for the breakdown of the year's time should be in a ratio of multiple to submultiple. Apart from this ratio, both the multiple and submultiple should be numbers of greatest possible divisibility. Thus will there be a greater number of possible equal divisions, and from that a more flexible choice of personal timetable for each of us. It means that prime numbers are to be avoided.

Then universality. The chosen system should be able to be understood and adopted as well by a four-year-old child as by an old man, whatever his cultural heritage.

Finally perpetuity. The calendar should be able to cross the millennia without mishap or reform.

Besides, the year should have for origin an annual astronomical event easy to be calculated (equinox or solstice). Exit arbitrary dates.