Winal

Tan is 360 days.

Uinal or Winal is 20 days.

And Akin is one day.

This actually makes a whole lot of sense when you're looking at like a UNOL, which is 20 days, and they counted their months as 20 days, and a ton was 360 days because they had their round calendar had 365 days, but five of those days were like unlucky, unnamed days.

Most of its units climbed in twenties.

Twenty days made a Uinal.

Twenty tons made a Ketoon.

Twenty Ketoons made a Baktoon.