Centimal time

Today

A day of one hundred tiks, counted from your midnight. A year of twelve months, opening on the solstices and the equinoxes.

Instruments

A day in a hundred. A year in twelve.

Two hands for the day, and a wheel for the year. The arithmetic sits in the how.

The day

Two hands

Numbered in tens, from 00 at midnight. The short gold hand is the tik. The long hand is the centik, and it goes once around each tik.

The year

Twelve months

In motion

Watch the day, then the year

The globe keeps your meridian in the middle. The orbit keeps the axis pointed the same way in space, which is why summer and winter trade places. Press play and the whole page — sky included — runs ahead of the clock.

Orbit

Earth and sun

A year, seen from the north of the orbit. Winter of this place is on the right.

Rotation

The hundred-tik day

The gold point is the place whose midnight starts your count.

Seasons

Twelve names

The marker walks the month you are actually in, then the next.

The star beside the name opens the observatory, where the sky can be set by hand.