Well, last time it was on was the weekend of June 18th and it was on again last night!
[http://www.youtube.com/watch?v=O1VKwCpi-Tk]
It is turned off again this morning though, wonder if it is on a timer for once every 6 months?
Update: Here is the announcement from Arona Turismo (04.01.2011)
[…] thanks to Steve Dodgson of The Beach in Tenerife for the lovely photo taken from his […]