The Arnold Arboretum celebrates the 100th anniversary of this beloved Boston tradition. Join lilac enthusiasts from all over New England to celebrate. A dazzling array of over 180 kinds of lilacs with delightful fragrances and gorgeous colors-plus tours, dancing, art, music, children's activities, and food (picnicking allowed on this special day only). On Lilac Sunday, the Arboretum is open as usual from dawn to dusk, with special activities from 10:00am until 4:00pm. Use of public transportation is strongly encouraged. Read more here.