62 years.
At times I think I'm the eldest on the forum. Thanks for reminding me that I'm not. Next year (2025) will be 60 years for me.
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I went to my 20th, and discovered there was no change from High School. If you didn't belong to a clique then, the reunions suck now.
I've been to about half of my reunions and plan to attend my next one. I was part of the clique in school. It was very large and contained cliques within the clique, but there wasn't any animosity between them. They broke down largely according to school activities. Band kids, eggheads, jocks, who's dating whom, who went to elementary/jr. high together, etc. The further out our reunions were from our graduation year, the more the alumni began to mix and mingle without regard to cliques. So many interesting people when you reach out. I've changed. They've changed. Life usually causes people to establish new priorities. On the flip side, I've eliminated certain "friends" from the clique who proved to be shallow and dishonest.