The “bemusement” they “engendered”? What, is this Tokio Hotel or something? No matter:

Happy birthday, Stapleton natives and identical twin brothers Randy and Ronnie Zavattieri, and enjoy it — the next one is four years away.

The Zavattieris are either going to be 48 years old or 12 today, depending on whether you count non-leap years. The brothers are the only twins in the country born on Feb. 29, 1960, and have been soaking up the attention as this year’s leap year approached — Randy Zavattieri got to read the seventh item on David Letterman’s “Top 10″ list the last leap year, and was invited with other “leaplings” to attend Martha Stewart’s show, which will air today (1 p.m., Ch. 4).

The bemusement the young twins engendered in strangers at the Stapleton Houses seems to have subsided.

“It was different then, people didn’t pay much attention to it (leap years),” said Randy, who now lives in South Brunswick, N.J., in a phone interview this week. “People didn’t understand why me and my brother were so happy to see our birthday on the calendar, but I’m not going to see my birthday again for another four years!”

By some estimates there are 4 million leaplings in the world, about 200,000 of them in the United States. The leap year occurs to correct a drift between the astronomical start of the seasons, or equinox, and regular calendar years, called common years, by inserting an extra day into the month of February once every four years.

For most of his life, Randy Zavattieri celebrated his birthday during common years on March 1, but he changed to Feb. 28 after appearing on David Letterman’s show, when he realized that much of the country’s other leaplings celebrated on that day.

*Hey, assignment desk, run down to the City Clerk’s Office to see if this is happening today . . .