Chotrul Düchen (Day of Miracles), plus anniversaries of Marpa Lotsawa,  Garab Dorje &  the 7th Karmapa, Chodrak Gyamtso.  Leaders of 6 main Indian philosophical schools challenged the Buddha to a contest and Buddha Sakyamuni performed miracles for 15 days. On this day, the effects of positive and negative actions are multiplied by 10 million times.