The Dunedin girl was born on February 29, 2016.
Depending on how you look at it, she will either be turning 1 or 4 next month.
To mark the occasion, her photographer grandmother Justine Turner was trying to gather together as many 4-year-old leap-day babies as possible for a special photoshoot.
"We wanted to do something special," she said.
They usually celebrated Lilly’s birthday on February 28, and tried to make it as much fun as possible.
This year, they will be doing a photoshoot with other leap-year babies either just before or after the big day, at the Dunedin Botanic Garden.
"It’s just a nice thing — we’ll keep it quite simple."
Anyone with a child turning 4 on February 29 can get in touch with Mrs Turner at brighteyesphotosnz@gmail.com.
She is offering free newborn photoshoots to anyone with a child born this February 29.
