I just got my answer from the Goolge News Alert I set up:

WASHINGTON, May 19 /PRNewswire/ -- The Communications Workers of America announced that a 4-day strike involving 100,000 union employees of SBC in 13 states will begin at 12:01 a.m. local time in each time zone on Friday, May 21. Workers will return to their jobs at 12:01 a.m. Tuesday, May 25.