Salman thanked co-star Katrina Kaif for making the film a blockbuster at the box office. The Ali Abbas Zafar-directed film has grossed Rs 151.47 crore in four days.
"I think 'Tiger...' has worked due to one reason and that is Katrina Kaif," Salman told reporters here.
Asked what Katrina gifted him on his birthday, the actor said, "She has made 'Tiger Zinda Hai' successful and that is her gift for me."
Continuing with his annual tradition, Salman celebrated his big day at his Panvel farmhouse, with family and close friends from the industry like Sajid Nadiadwala, Iulia Vantur, among others. Also present were Katrina and Ali.
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Katrina said she was elated with the success of "Tiger Zinda Hai".
"I am very happy right now. Ali has done a fantastic job. It's a wonderful Christmas and New Year present for all of us," she said.
It is a working birthday for Salman as he is currently shooting for "Race 3".
Last evening, at the Jio Filmfare awards press conference, Salman's actor friend Shah Rukh Khan wished him on his birthday with a song.
"Tum jiyo hazaaron saal (May you live long)... I wish him all the best. I won't be able to meet him on his birthday because my children are here and I want to spend time with them. But we will celebrate when he comes back. We can celebrate Salman Khan's birthday for a whole month.