Vimy Ridge in April?

Hi All,

I have just moved over to London. Very glad to be a couple hours from Paris via train. So cool.

Anyway, my grandfather was a veteran of WWI, and I want to go and visit Vimy Ridge for that reason. I was thinking of going some time this summer, but I thought perhaps I would wait until April as that is the anniversary of the battle.

I was wondering if there is anything special that goes on during the anniversary of the actual battle (April 9 through April 12) that would be worth going to see. I can't find anything online that would indicate they do anything special for those dates, but thought I might ask here.