The date "09-09-09" (Wednesday September 9 2009 09:09:09, more specifically) has been named "Cirno Day" for obvious reasons. For some reason, numerous aspects of this day everything could be translated into or connected with nine. For example: September 9 is the 252nd day of the year and 2 + 5 + 2 = 9, you need 9 letters to type "Wednesday" or "September", and Japan's timezone is +9. Other names for this day include "The Strongest Day" and "⑨ Day".