From the article on the front page. Bloomsday used to have more than 60,000 people signing up but was just below 40,000 this year.
"And it makes one wonder if Bloomsday is becoming another tradition, like dating and baseball, killed by millennials. … Just kidding. Don't take out the Twitter pitchforks and torches. It’s not an age thing."
https://www.spokesman.com/stories/2019/may/07/grip-sports-bloomsdays-numbers-continue-fall-trend/