When is the Otaru Snow Light Path Festival?
In 2015 it will be held from February 6 (Fri) - 15 (Sun).
You can find more details on the official website.
The illumination is daily from 17:00 to 21:00.
The more popular “Sapporo Snow Festival” is usually held around the same time, so visitors can attend both festivals.
2015 the snow festival in Sapporo will be held from Feb 5-11.
There are two main event areas:
The Unga Kaijo area and
the Temiyasen Kaijo area.
And for more information :
http://yukiakarinomichi.org/