Every day, tens of thousands of people walk down Main Street, U.S.A. On one recent morning, one of them walked into the record books.

A billion, and counting

Disneyland has welcomed its one billionth guest, the resort announced, a cumulative total reached over nearly 71 years, KTLA reported. The honor went to a visiting family from Arizona — a couple and their 8-year-old son — who were greeted with a surprise celebration on the platform of the Main Street train station, with Mickey and Minnie Mouse on hand and a commemorative sign reading "Population 1,000,000,000," according to the Disney Parks Blog.

The family was treated to a VIP day, Disney said, including experiences the park reserves for special occasions. Resort officials framed the milestone as a tribute to the generations of visitors who have made Disneyland part of their family traditions.

Why the number matters

That figure is a marker of how thoroughly Disneyland has embedded itself in Southern California and in American life. When Walt Disney opened the park in Anaheim on July 17, 1955, the idea of a clean, immersive, family-oriented amusement park was a gamble. It became a template, spawning a global theme-park industry and turning Anaheim into a tourism capital and one of Orange County's economic engines.

Seven decades on, the original park anchors a resort with a second theme park, hotels and the Downtown Disney district, and it remains a rite of passage for California families and a magnet for visitors from around the world.

A birthday for the park, too

The timing was fitting. The billionth-guest milestone landed just under two weeks before the park's anniversary on July 17, when Disneyland will mark 71 years. For all the numbers, the appeal Disney is selling is stubbornly simple — the same one that has drawn a billion people through the gates: the promise of a day when, at least inside the berm, the ordinary rules of the world are suspended and, as the parks like to say, wishes come true.