"Why free time because of snow and Emmett Lee Dickinson?" you ask. Because it snowed and schools are closed (hence the time to plog), and it was Emmett Lee Dickinson who invented "snow days" (yes -- he was the very first to suggest that schools close due to inclement weather).
Dickinson even wrote about snow days in his now-classic poem, "The longest wait that God appoints" (which inspired third cousin Emily to write her poem, "The longest day that God appoints"). Both poems are shown below:
By Emily Dickinson:
The longest day that God appoints
Will finish with the sun.
Anguish can travel to its stake,
And then it must return.
By Emmett Lee Dickinson:
The longest wait that God appoints
Starts after it has snowed.
Anguish as we hold our breath
To learn if schools are closed.
To this day, when radio and television stations announce school closings due to snow, children give three cheers for Emmett Lee Dickinson -- even in Alaska where the Eskimos have twenty-six different words for "snow," but just one phrase for "school's closed!"