365 days is what people commonly think of as a year. So if you're born Feb 29th and celebrate your birthday one year later (whether you call that 365 or 365.25), you land on Feb 28th. Then again, folks born between Jan 1 and Feb 28th of a leap year celebrate their birthdays 366 days later by calendar days.
Anyway, I'm not sure there's any more or less logical date to use and Feb 29th babies seem to choose both about equally:
> “I love when people ask me, ‘Do you celebrate on Feb. 28 or March 1?’” said Raenell Dawn, a co-founder of Honor Society of Leap Year Day Babies. “I get to tell them, ‘Both, because I can.’ But I’m a February baby; I was not born in March.” An informal poll of the society’s members showed about a 50-50 split between the two dates, said Ms. Dawn, who is celebrating her “Sweeter 16” by turning 64 this year.
Anyway, I'm not sure there's any more or less logical date to use and Feb 29th babies seem to choose both about equally:
> “I love when people ask me, ‘Do you celebrate on Feb. 28 or March 1?’” said Raenell Dawn, a co-founder of Honor Society of Leap Year Day Babies. “I get to tell them, ‘Both, because I can.’ But I’m a February baby; I was not born in March.” An informal poll of the society’s members showed about a 50-50 split between the two dates, said Ms. Dawn, who is celebrating her “Sweeter 16” by turning 64 this year.
https://www.nytimes.com/2024/02/28/style/leap-year-explained...