This announcement comes from the Sri Lankan Students Association.
Clarkson University Sri Lankan Students Association have organised a Poson dansala – a free Ice cream give away to celebrate Poson Poya day — on June 3 at Ives Park gazebo in Potsdam from 12-4 p.m. Please see the flyer for details.
Brief description of Poson poya day in Sri Lanka
Poson Poya is celebrated by Buddhists in Sri Lanka by visiting the Temple with offerings of flowers and incense to pay homage to Lord Buddha. As on all other Poya days Dhamma sermons are given by the prelates and devotees observe Sil during the day. The city of Anuradhapura is where the main religious observances take place every year, given its importance as the location where this historic event occurred. In Anuradhapura as well as the rest of the country, Poson celebrations are similar to Vesak, with Pandols and Dansal (alms-giving stalls) to be seen everywhere. Buddhist families decorate their homes with coloured lights, lanterns and Kudu, while making use of the holiday to engage in meritorious deeds. Bakthi Gee (religious songs) too are sung in public areas and the atmosphere on this full moon day is one of peaceful co-existence. Another feature of Poson celebrations are colourful processions which commemorate the visit of Arahant Mahinda. Known as Mihindu Peraheras these processions include Elephants, drummers and dancers which are characteristic elements in almost all such peraheras in the island.
Source – https://www.tourslanka.com/events-festivals/poson-poya-festival/