The French version ran several times on Radio-Canada, there were at least 3 or 4 reruns. At first it was on Saturday morning at 10, starting somewhere during the 1984-1985 season (I don't remember if it was in September or January).
I also found
this archive that shows it was also playing in 1989 at 8 am on Sunday. I remember there was one hour of Astroboy (2 episodes) on both Saturday and Sunday at 8 am around that year - there was a special event on the day that I linked to, which may be why there was no Astroboy at 8:30 on that particular day. Or maybe the two back to back episode aired later? It's so confusing!

The English version was on
CBC, but I don't know when because I've never seen it.