Vesak: Vesakha in Pali; Vaisakha in Sanskrit; Devanagari in Sinhala

Question:
Is there a Buddhist equivalent of Christmas?

Answer:
According to tradition, Prince Siddhattha was born, became the Buddha and passed away on the full moon day of Vesakha, the second month of the Indian year, which corresponds to April-May of the Western calendar. On that day Buddhist in all lands celebrate these events by visiting temples, participating in various ceremonies, or perhaps spending the day meditating.

---Good Question Good Answer, by S. Dhammika---