The thirteenth month of the year, characterized in North America by cold weather and snow.
For other unusual months, see Febtober.
Marge: voiceover: It all started on the thirteenth hour, of the thirteenth day, of the thirteenth month. We were at Sprinfield Elementary to discuss the misprinted calendars the school had purchased.
Homer: shivering, looking at the calendar Oh, lousy Smarch weather.
The thirtheenth month of the year.
Lousy Smarch weather. "Don't touch Willy." Good advice.