I can't find an expiry date, but I suspect it will be 30-Nov-2016.
Arduno: http://www.instructables.com/class/Arduino-Class/
Bread: http://www.instructables.com/class/Bread-Class/
Canning & Preserving: http://www.instructables.com/class/Canning-And-Preserving-Cl…
LED & Lighting: http://www.instructables.com/class/LEDs-And-Lighting-Class/
Raspberry Pi: http://www.instructables.com/class/Raspberry-Pi-Class/
Superhero Costumes: http://www.instructables.com/class/Superhero-Costume-Class/
Since when did instructables start charging?