Boriskov, you the time traveler
I checked my last year stamp from Canada and it is very clear says 25 JN (january) 2013, so I would agree that it looks more like June or July. If to count by months (6 months stay) then it s more likely June.
I had a funny mistake from USA border too
Instead of stamping 10 Dec 2013 the officer stamped 10 Dec 2014, so I was allowed to stay not for one month as supposed to, but for one more year