Differing  practises  with  the  anthem  across  the  country  are  interesting  to  hear.

When  I  grew up  in  Alberta  in  the  late  50s  and  early  60s  it  was  common  to  open  events  with  O  Canada  and  end  with  God  Save  the  Queen.  Over  the  years  the  closing  just  eventually  disappeared  in  most  cases.