The dates for the proposed (NOT GUARANTEED TO HAPPEN YET) are as follows:
SPANISH AIRPORT STRIKE DATES
April 20,21,24,25 and 30
May 2,14,15,19 and 20
June 13,23 and 30
July 1,2,3,4,15 and 21
August 1, 15 and 31
Remember there may be delays the day before and after the dates shown above. If the unions & goverenment have some sort of agreement then the fire department and cleaners may not strike, so your flight could be a-ok.
Ian