This Sunday is Lama Tsongkhapa day. There will be no Dharma teaching, but instead a prayer. It will start at 10 a.m. and end for lunch.
Some background on this special day as described from Lama Yeshe website:
Ganden Ngamchoe (or Lama Tsongkhapa day), is a celebration of the anniversary of Lama Tsongkhapa’s parinirvana and enlightenment. It is celebrated on the 25th day of the 10th month in the Tibetan calendar. This year, Lama Tsongkhapa Day falls on Sunday, December 2.
This event is also known "festival of lights" as it is a custom to light hundreds of lights in every home and temples and monasteries. So, in Tibet on this night because of all the hermitages in the mountains, we used to see the mountains lit up.
Lama Tsongkhapa (1357-1419) is a renowned saint, scholar, yogi, teacher, and author from Tibet. Among his many contributions to the Dharma, Lama Tsongkhapa wrote 18 volumes of teachings, including his Lam Rim Chenmo – The Great Treatise on the Stages of the Path to Enlightenment.
All the teachings we receive at our temple come from these volumes. So the Tsog offering we is to remember his kindness and pay homage to him. Please bring an offering to the alter. There are no restrictions.
All merit (positive potential) accumulated on this day is multiplied 100,000 times.