It’s a real-life case of “Groundhog Day” — albeit with a much shorter reset button.

An Illinois teenager wakes up every day thinking it’s June 11, the day she suffered a traumatic brain injury that makes her memory restart itself every two hours.

“I have a calendar on my door and I look and it’s September and I’m like ‘Whoa!'” 16-year-old Riley Horner told WQAD.

“People don’t understand — it’s like a movie.”

Horner’s nightmare started on June 11 when she was accidentally kicked in the head at a dance, she told the station.

Despite dozens of trips to hospitals close to home in Monmouth, doctors still seemed baffled as to exactly what is causing her bizarre memory loss, her family says.

“They tell us there’s nothing medically wrong,” her mother, Sarah Horn, told the station.

“They can’t see anything. You can’t see a concussion, though, on an MRI or a CT scan. There’s no brain bleed, there’s no tumor.”

But the schoolgirl has to constantly write things in a notebook just to function, also taking photos on her phone so she can remember basic things like where her locker is, she said.

It also means she has no recollection of major family events.

“My brother passed away last week and she probably has no idea,” her mother told the station. “We tell her every day but she has no idea about it.”

Her family fears for her future after being warned it could be a lifelong problem.

“I am not okay with that,” her mother said. “We need help. We need somebody that knows a little bit more because she deserves better.”