What are your season-end triggers?

I wonder what signifies to each owner when the season ends for personal watercraft? It is a date on a calendar, like the first day of fall, first of a month that is the defacto end of boating season for that region, or maybe it's the back to school who's got time situation, or the average daily temperature of the air or water below the personally bearable number.

For me it's the combination of all of those. And it's getting to that time for this year. It's a reflection time of 'tempus fugit' when it's time to pull the Sea-Doos out of the water and get them prepped for winter storage.