Jennifer Lopez‘s marking her wedding anniversary in the Hamptons … but, it’s not exactly a romantic getaway — ’cause her man Ben Affleck is 3,000 miles away.

The singer-songwriter spent Tuesday — the two-year mark in their marriage — riding a bicycle around the affluent Long Island hot spot … rockin’ a pair of overalls with her entourage in tow.

J Lo accessorized with big hoop earrings … though the jewelry that’ll really catch people’s eyes is the rock on her left hand — yep, she’s still got her wedding ring on.

Instead of hopping on a tandem bike with his wife, Affleck spent part of Tuesday at his L.A. office — making it clear Bennifer didn’t have their anniversary circled on their calendars … and it ain’t spurring them back to each other’s arms.

In fact, neither acknowledged the day publicly — no cryptic post on Jennifer’s social media, but, at this point, that’s no surprise.

We broke the story… sources with direct knowledge say they’re headed for a divorce — and, the recent public listing of their home was the next big step toward a legal split.

BTW J Lo did post about Ben on Father’s Day — even though he’d already moved out by that point — so, it wouldn’t have been out of character for her to say something on social media.