Mayday

photo : Maxppp

Not a signal for help, though with many of the usual workers' processions being allied to GJ demonstrations readers may need help getting through the big cities on this holiday.
Another French tradition on this day is to present a loved person with a sprig of lily of the valley - "muguet". They are supposed to be sold by amateur vendors, though as usual most are now grown and packaged by professionals. But the symbol remains.