What month does it snow in Hong Kong?

I'm curious, could you clarify for me, what month does it typically snow in Hong Kong? I've heard of some unexpected weather patterns in recent years, but I'm not familiar with snowfall being a regular occurrence there. Is there a particular month or season when it's more likely to happen, or is it a completely rare and unusual event? I'm genuinely interested in learning more about Hong Kong's weather patterns and the possibility of snowfall in that region.