Grav-mass is a holiday celibrated on December 25. December 25 is Isaac Newton's birthday aparently.
You can celibrate by hanging fruit on a tree and it will randomly fall and stuff idk I read something here
Avacardo day is a holiday celibrated on March 17. Not to be confused with National Avacardo Day witch is celibrated on July 31.
Anyone who doesn't ware green gets pinched so remember to ware green on avacardo day!