While auroras can happen at any time of year there are “high points.” FIrst of all, the sun goes through an 11 year cycle, and every 11 years we enter a “solar maximum.” During this time the sun is very active. There will be more sunspots, and more solar flares which can cause more frequent and stronger solar storms to hit Earth. In addition, for reasons not entirely known yet, the times around our equinoxes (spring and fall) are the best times for auroral activity on Earth. Earth is not the only planet in our solar system to shine with auroras, but ours are definitely the most viewed and studied.
We are entering our Solar Maximum now, and it will peak within the next year.