ohmidog!

Clifford, who has always been so much more than big, so much more than red, is now more than half a century old.

Clifford turned 50 Monday.

And he had a big red birthday party — many of them, in fact.

While his birthday was celebrated in schools across the country, the biggest  shindig was in New York, where students sang happy birthday outside the headquarters of his publishing company and Mayor Michael Bloomberg declared it Clifford the Big Red Dog Day.

Clifford’s creator, Norman Bridwell, took questions from first- and second-graders during a webcast shown there and beamed live into more than 5,000 classrooms around the country.

Bridwell, 84, told the Associated Press, his initial plans were for Clifford to be as big as a horse; eventually, though, Clifford became bigger than a house. He ended up red because that’s the color of the jar of paint Bridwell had nearby.

“I don’t really understand it,” he said of Clifford’s enduring nature. “Whether it’s his color, or if it’s the fact that he’s clumsy, like a lot of kids are clumsy.”

Bridwell’s daughter, upon whom the character Emily in the books is based, told  reporters her artist father and his wife, Norma, were struggling to earn a living in New York when Norma suggested he try his hand at illustrating children’s books. Norma came up with the name Clifford, too, based on an imaginary friend she had as a girl.

Bridwell’s daughter, now a teacher, was a one-year-old at the time.

Bridwell shopped his drawings around, meeting initially with rejection. Eventually, he and Clifford were welcomed at Scholastic, and the company provided Bridwell with “10 Big Ideas” around which to fashion the stories, including sharing, respect, believing in oneself and helping others.

Today, Clifford is part of elementary school curriculum, and more than 126 million copies of the 90 books about the big and big-hearted dog are in print in 13 languages, in addition to a TV show, plush toys, a magazine and, yes — who says old dogs can’t learn new tricks? – even a Clifford app.

(Photos: Courtesy of Scholastic)