Wizard's Death Rituals

[gelite67]

No: HPFGUIDX 113337

When a wizard dies, is there any kind of ceremony held?  There was no 
mention of any ceremony for Sirius that I recall.  I also wonder if 
Harry's parent's are buried.  If so, it looks like someone would tell 
him where, so he could visit his parent's graves.

Also, it's always bothered me that Harry never seems to think about 
his parents on Halloween, the day that they died.  I know that he 
thinks about them at other times, but it just seems odd to me.  Most 
people who are old enough to understand what the anniversary of a 
death is acknowledge it in some way.

Angie