I read online today that Spanish air traffic controllers will hold another round of strikes in July and August
Old news my friend, the dates were published back in January (e.g.
this article dated 13th January 2015) :
February: On October 11 to 13 hours.
March: The 10th of 15-24 hours. 24-hour strike on 19 and 22.
April: The 1st of 15-24 hours. 24-hour strike 2.5 and 6. On 30 15-24 hours.
May: 24-hour strike on 14 and 17 (affects only the centers of Madrid).
June: On 3 15-24 hours. 24-hour strike on 4.7 and 30.
July: Strike 24 hours on 1, 2, 3, 4, 5, 15 and 31.
August: Strike 24 hours on days 1, 2, 14, 30 and 31.