On this day as kindly suggested by Tashi Nyima we should all pray for the long life, well being, mental peace and Happiness for all those who harm us and the Buddhadharma, Let this be a time where we embrace the Essence of Buddhadharma and practise accordingly to benifit even those who harm us. 
Tashi is most wise. We do not need to wait for a set date to exercise compassion for those whose negative karma harms others.
'Forgive those who trespass against us' - and exercise Compassion in a form which helps them avoid future bad karma thought their actions. ;)
Prayers for the long life of our root gurus and praise of the lineage masters can be a daily practice.
