Wivamovian Calendar

The Wivamovian Calendar system is used in Wivamovia. Five other nations are deciding if they are gonna implement it or not. The system is been seen as very efficient. The Wivamovians due to their isolation had some info from other nations about something called a "calendar". They decided to figure out how it works and came up with this.There are 4 years in the irl year the first starts in 1st of Januari The second on 1st of April. The third on 1st of Juli and the last on 1st of september. The standard year has 91 days, tho times differ some months are 31 irl. You just add/remove the day to the month Ithhir.