Figuring out how to celebrate the band’s 25th anniversary was a unique challenge for Bayside.

So the punk rock quartet from Long Island took pages from both Metallica and Taylor Swift to create “25 Years of Bayside: The Errors Tour,” which began recently and will run through a Sept. 26 hometown date.

“Every tour, we like to try to shake things up a little bit,” frontman Anthony Raneri explains from his current home in Nashville. “We pretty much do one headline tour every year, and we know to get people to come see us every year, we’ve got to change the sightlines a little bit. It can’t just be the same show all the time.

“Sometimes we do an acoustic tour, sometimes we do a big tour where we play big venues, sometimes smaller venues. We just want to give our fans an experience.”

Raneri, 42, says Bayside actually conceived The Errors Tour idea “years ago, and we decided the 25th anniversary was the right time to put it in place.” Like Metallica’s M72 World Tour, Bayside is playing two consecutive dates — albeit in clubs and theaters rather than stadiums — and offering completely different shows each night. And like Swift’s Eras Tour, the quartet is sampling from each of its nine studio albums, playing songs from its first four albums at the initial show and then from the subsequent five titles — leading up to last year’s “There Are Worse Things Than Being Alive” — the following night.

“At this point in our career, with the back catalog we have, it’s hard to get songs into the set list,” Raneri explains. “We have so many singles people want to hear … It’s like how you can’t go to see Metallica and they don’t play ‘Enter Sandman,’ or you see the Killers and they don’t play ‘Mr. Brightside.’ There’s just songs that we have to play.

“But that means track eight on our first record or track five on our fifth record, when is anybody going to hear those songs? So this is a good way to get to those deeper cuts that have been left out and let people hear them again.”

And while that means an iconic hit such as 2005’s “Devotion and Desire” may not be played every night, Raneri is finding that Bayside has the goods to deliver without it.

“I think there’s plenty to keep people happy either night,” he says. “The second night might not have ‘Devotion and Desire, “but ‘Sick Sick Sick’ — it’s crazy to think that’s in the second half of our career, and ‘Already Gone’ and ‘Go To Hell.’ There’s more than I think we even realize.”

That’s certainly making for a joyous celebration for Raneri, who joined the existing Bayside in 2001 and fellow guitarist Jack O’Shea, who came on board in time for the 2004 debut album “Sirens and Condolences.” Bassist Nick Ghanbarian joined shortly after its release, while drummer Chris Guglielmo was added in 2006 after John “Beatz” Holohan was killed in a band van accident on Halloween day 2005 in Wyoming.

Bayside — named after a station on the Long Island Rail Road — made its reputation with hard touring, from clubs to the Vans Warped Tour. “Now, at 42, yeah, I’m shocked there is a version of me still doing this, but at 15 or something, I was so sure it was gonna happen,” Raneri says. “I started this band so young. I was a dreamer. I was in high school, right? Bills weren’t a part of my life. Having a family to support wasn’t a part of my life, or having to make ends meet and all of that. It was just hopes and dreams at that point. I guess I could liken it to a 12-year-old kid who plays Little League baseball: ‘What do you want to be when you grow up?’ ‘I’m gonna play shortstop for the Yankees!’

“I got to fast forward into the part where it’s actually happening. I never had to have a moment of clarity of ‘maybe this can’t happen.’ I have very few memories of my life not being in this band, which is very strange but also really wonderful.”

Raneri also has a pretty good idea about why Bayside has been able to maintain a following in an increasingly fickle marketplace.

“I just think there is an honestly in what bands from our world have always done,” he explains. “You look at some other genres and there’s a lot of, like, image stuff. You look at Flock of Seagulls or something like that from the ’80s, and it’s just so for the time. It sounds like the time, they look like the time, the lyrics are of the time. You look at hair metal, bands like Cinderella and things like that. They’re bad-ass songs when you’re, like, some kid in high school, but are you gonna be 40 or 50 and still connect with that? Of course not.

“But what we do and what the other bands in our scene do, it’s earnest. That’s a pillar of its identity. It’s not about a style or a time, so it still connects all the way through.”

Raneri and company plan to connect more and most likely in the near future. Bayside plans to begin work on its next album “the day after” the Errors Tour finishes, although he isn’t yet ready to hazard a guess as to what it will sound like.

“I always start with finding influences,” Raneri says, “so I’m just listening to a lot of music and I’m writing down ideas. When I hear a song that I think would be a cool inspiration for something, I write it down. I have notepads around my house with my ideas, notes apps in my phone, playlists that I’ve made of songs I want to take inspiration from for the next record.

“It’s almost like I’m making this very large Pinterest board in my head, and then when it comes time to actually put pen to paper, I’ll have that board to reference. I’m not at a stage where I know what that inspiration turns into, but I’m shaping, and we’ll see what comes out of that.”