I still like the earth date approach the most: exactly 4 weeks, 28 days a month, 13 months a year and 1 or 2 special earth dates to celebrate depends on whether

I still like the earth date approach the most: exactly 4 weeks, 28 days a month, 13 months a year and 1 or 2 special earth dates to celebrate depends on whether the year is a leap year or not. Very neat and perpetual :D