To some, it may be the first day of school. For others, it's Back to School Night. What annual milestone is your indication that summer is over and the school year is on "for reals"?
First progress grade reports are due? (When I started teaching, this was at the end of October. They were referred to as "Quarter Grades." This year, it's September 27. You could call them "Eighthly Grades," or "Monthly Grades," or "How did we go from 4 grading interims to 8 grading interims and how much smarter are students as a result?")
The end of the first 20 days of class leveling? (And a slowing of the revolving door.) This is the time of year when teachers announce their newest "adds" in the faculty room like old fighters showing off scars. The real problem lies in the expectation that, four weeks into the year, a teacher has some magical technique that will bring a new student from zero to completely-caught-up in short order and without pain. And without any negative consequence on that first round of eighthly grades.
First parent conference? Haven't had one (yet), but we all know that can't last.
First JB-Weld repair job? This year mine was on a Pasco Visual Accelerometer. I'm not sure how the interior thumbscrew anchor post got fractured, but it did.
In related news, I noticed the milk I bought today will not expire until after paycheck breakfast. Huzzah!