Today we are using Classical planets, Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn as weekdays Sunday, Monday, Tuesday, Wednesday, Thursday, Friday and Saturday respectively. Modern planets Uranus and Neptune not comes in calendars. Perpetual calendar created by various proposals needed two new weekdays. One day for every year and two days for every leap year are the days which belongs to No week, No month. I propose to assign two new weekdays i.e., Uranday and Nepday. Uranday is assigned to Leap day occurs in leap years. Nepday is assigned to Year End day as this is the farthest planet in solar system.
New Weekdays for Perpetual Calendars