The terms IGA (Intergalactic Age) and PGA (Primal Galactic Age) are used to number years of the Intergalactic Standard Calendar. The dating system is based of when hyperspace was further developed to allow intergalactic travel. This calendar dates from the time the travel was discovered. This year is known as 0 IGA. The calendar also dates backwards with PGA. This calendar is the most widely used across the universe and covers the entire history of the universe.