Saka Dawa starts this year on May 19, and continues to June 16. Its meant to celebrate Buddha Shakyamuni’s birth, death and enlightenment. A special feature of this month is that all the virtuous practices that one does during this time is multiplied, and is therefore known as the month of merit. Some suggestions from Lama Zopa and FPMT on for generating merit during this time include:
Here is an interesting video with some prayers and Praises to 21 Taras done at Tsengdok Monastery during a previous Saka Dawa.