The Solar Year Calendar was established when Hikusaak took the position of High Priest and began his theocratic rule over Harmonia, two years after the Aronia Kingdom was overthrown and Harmonia established in its place. As such, the year in which Hikusaak became High Priest is marked as year 0.
- This site uses the Solar Year Calendar as the standard time measurement.
- The Solar Year Calendar is often abbreviated "SY". The most common usage remains "IS" (In Solis), however, the term is incorrect.