International Volunteer Day on Dec 5 is always well-supported in Israel. Israel Central Bureau of Statistics published the volunteer data for 2015. Last year, 1.1 million Israelis volunteered – 21% of adults age 20 to 64 and 16% of those 65 and older.
http://www.jerusalemonline.com/news/in-israel/local/2015-1.1-million-volunteered-in-israel-25152