Welcome Address by The Most Ven. Prof. Dr. Phra Brahmapundit, the Rector of Mahachulalongkornrajavidyalaya University, President of the International Council for Day of Vesak (ICDV) and the International Association of Buddhist Universities (IABU) on The Opening Ceremony of The 15th of United Nations Day of Vesak Celebrations 2018 at Mahachulalongkornrajavidyalaya University (MCU), Conference Hall, Ayutthaya, Thailand.