If you’re the kind of person who loves a milestone occasion, Summer Soulstice has a good one for you as it makes final preparations for this Saturday’s music festival on the East Side. East Side BID #20 organized the first Summer Soulstice in 2001, which means the event turns the ripe old age of 25 this year. However, it’s only the 24th annual festival because of COVID-related cancellations in 2020 and 2021. But those aren’t the numbers most people care about.