Tarna

The calendar is exacly the same as the one on Earth except the year zero correspond to the arrivial of scientist from the submerged city: Torka. They managed to force a common language and greatly develop the society. However, they did not manage to unify the different territories but still reduced the amount of wars.

This calendar splits 356 days of the year in 12 months which alternate between 30 and 31 days, and 28 days for the second month.

Additionally, the days are grouped in weeks composed of seven days each. The last two days ar often used to rest.

A full cycle around the sun isn't exactly 356 days and the calendar needs some adjustment at some point.

A day on Tarna is splitted in 24 hours, which are divided in 60 minutes and finally divided in 60 seconds.

Moreover, the scaling of time in Tarna is 1.0 times the universal timescale used as reference since it's the world where the universal calendar was created.