How do you know summer is going to end?

When I start wondering why the sun is setting at 7pm instead of wondering why it is still so bright.

Even though
the sun rises at unearthly hours and I wake up 2 hours earlier than I should everyday,
I look like chocolate from the blazing sun,
I perspire every minute day and night,
laundry piles at the speed of light,
the perishables perish faster,
I get diarrhoea when I accidentally eat the mouldy bread,

I don't want summer to end.