I wonder why we haven't thought of a decimal calendar synced with the seasons like:

          W1 W2 W3 W4 W5 W6 W7 W8 W9
    SPR 1 10 10 10 10 10 10 10 10 10
    SUM 1 10 10 10 10 10 10 10 10 10
    AUT 1 10 10 10 10 10 10 10 10 10
    WIN 1 10 10 10 10 10 10 10 10 10 1 [1]

So we only have four months (seasons) and each has nine weeks of ten days each. Each season starts with a neutral day (equinox and solstice) then follow the weeks with ten days each. At the end of the year there is a universal holiday and an extra holiday for leap year.

We could also name all days of the week after the eight planets and the sun as initially intended (including moonday). We could have seven working days and three days off or three working days then two off then three more working days then two off per week.

Whatever, just wanted to leave a stinky brainfart in this room for posterity.