The actual anniversary of the album’s release is May 8th, and the Michael Lindsay-Hogg movie came out on May 13, 1970. According to showbiz411, the whole 50th anniversary celebration will occur in the fall, not this spring. There are two reasons.
One reason is that no work has been done yet on the mixing, remixing and so on of the original album, the original movie’s soundtrack, or the Peter Jackson documentary. The mixing sessions with Giles Martin and his crew set for this July. It shouldn’t take too long.
The other reason is that all these packages will be aimed at a holiday release.