The Arvalean Calendar

This is the official calendar followed by the majority of the modern world. The Arvalean Calendar established the year that Emperor Falvor was decimated and the Arvalis was given to King Saymar of Alda.
The year is broken into 312 days, consisting of 11 months. Each month varies between 28 and 29 days, and each week consists of 8 days.
The first month of Arvem has 28 days.
The second month of Korem has 28 days.
The third month of Eydrem has 29 days.
The fourth month of Hollem has 28 days.
The fifth month of Damaytem has 28 days.
The sixth month of Bellum has 29 days.
The seventh month of Sedonem has 28 days.
The eighth month of Torrem has 28 days.
The ninth month of Malladusem has 29 days.
The tenth month of Parvem has 28 days.
The eleventh month of Shem has 29 days.
Each month has 8 weekdays. In order, they are: Marda, Mirda, Ineda, Ashda, Rada, Ellda, Amarda, and Lusda.
The current year is 2612 YA (In the year of the Arvalis) and it started on Ashda, Arvum 1 on a new moon.
Aerda's moon, Ludus, has a cycle of 29 days. This year is anticipated to be a historical year because it started on a new moon. This is held by many cultures in Aerda to have great significance.
The calendar year is filled with certain feast days, festivals and holidays depending on where in the world you live.