A good day to buy? Either today or Monday(assuming the markets are open Christmas Eve)would most likely be opportune times to buy more shares in ACB. No stock goes up or down forever, and I'm thinking in the New Year things will be looking up.
If Aurora is going to announce any news, why would they do it in the next few days when the tax loss selling and Christmas(I need money now!) dumping of stock have pretty much disrupted all the markets for the past couple of weeks.
Also, Trump can't let the China thing go on forever, so I would look for positive news in that arena as well.
January could be a very key month for Aurora.