[In light of Michael Keaton’s return as Batman in 2023’s The Flash, I thought I would re-post this piece from 2019 about the the original Batman movie from 1989, now thirty-four summers ago. The original post is here if you want to compare. Ever since 1989, the date of June 23 has been fixed in my mind. It will always be the true Batman Day for me and likely millions more.]  Where were you 30 years ago today? Probably standing in line to see Batman. The Date  It all began with a symbol and a date. A simple poster considering what it wrought. For months, all you needed to know…