eJewish Philanthropy, April 5, 2017- 13,000 Teens Serve Communities Worldwide as part of International Day of Jewish Youth Service. Approximately 13,000 Jewish teens in more than 90 communities across 20 countries are participating in a day of community service and improvement projects this spring as part of J-Serve, the International Day of Jewish Youth Service, anchored on the official date this past Sunday, April 2, 2017.