Tomorrow is the September equinox.
Theres a fictional line floating above the Earth's equator - it's called the celestial equator, and the sun crossing that line is what triggers our September equinox. On the equinox, the night is as long as the day. From that point onward, night will slowly dominate, plunging the Western world into winter.
A more popular (though incorrect) name for tomorrow's event is Daylight Savings Time. In actuality, September 23rd is when Daylight Savings Time ends, and Standard Time begins.
This means tomorrow we'll be turning our clocks backward an hour. 8am will turn to 7am, 10pm to 9pm - you get the picture.
It's an easy thing to set your clock, avoiding lateness for any important dates. Just ask our white-furred friend to the right - he can often be heard stressing the importance of punctuality.
Illustration by Emma Stothers