Can a day make a difference?  JustServe thinks it can.  September 11th is National Day of Service in Canada as well as our Provincial Day of Service in Ontario. serviceday.ca. Bring your family on Sept. 11 to make cards and posters to thank police officers, firemen and ambulance workers.  All supplies will be provided.  Children are welcome to wear a costume or hat of a first responder.   Event takes place at The Church of Jesus Christ of Latter-day Saints at 632 Thornton Rd. N. in Oshawa.