When you

Need to re-fill the gas in the car’s air-conditioning,
Discard socks for 8 months,
Start getting stung by mosquitos,*
Abandon the long trousers,
Start watering the garden,
Have breakfast on the terrace,
Start seeing the foreign registrations on the cars,
*Sleep with the window open,
The Poppies start,
Natives can (occasionally) be seen in shirtsleeves,
The signs for Asparagus abound,
It only takes the bread 30 minutes to rise,
The Chervil on the terrace overflows its pot,
The wild purple Irises start to die,
The daily English papers arrive on the day- rather than the day after,
You buy a new sun hat,
you know (at last)
that Summer has arrived in the Languedoc.