I've been flying on each and every birthday in the last 4 years either on LX or LH (2 times ZRH-GRU in F with LX, 1 time FRA-GRU in C with LH, 1 time FRA-LED with LH). They have never recognized it. I don't care to much but find it somehow inconsistent since my former boss has received 2 times a bottle of Champagne even when flying in european Y.