Applying sandman's powder on tavern, with thosand snowflakes buff running - removes all the snow :]
When testing, I hopped that game wouldn't let put other buff while one is running.
But island under the snow in the dark would be even greater and with stars twinkling ;]

oh and descriptions of both buffs might be incorrect (32h self buffed) and/or timer on both buffs might be incorrect (7days selfbuffed and 11 days buffed by friend).