Toronto Star, February 2, 1912.
Posted above is the earliest front page story regarding Groundhog Day published by either the Globe or the Star.
On that day’s editorial page, the Star published a piece about the occasion by syndicated poet Walt Mason (1862-1939).
Toronto Star, February 7, 1908.
Here’s the earliest story from the Star about Groundhog Day, though it’s less about the day, more about farmers from southwest Ontario petitioning the provincial legislature for the right to shoot the critters.
The Canadian Encyclopedia has a lengthier look at the day’s origins, and its history in Canada.