“Dad, Today is your birthday. I had an extra strong cup of tea just how you liked it,” she wrote in the caption
“I hugged Mum for you and told her how much we love her. Robert and I went on a hike through the mountains you cherished. I watched one of your documentaries with Chandler and shared stories about you. I walked through your office in the zoo and smiled at our old family photographs. Today and every day I miss you and love you beyond description. You’re always with me.”
Irwin’s wife, Terri Irwin, posted her own tribute to her late husband.
“Today would’ve been Steve’s 58th birthday,” Terri said in her Twitter post
. “While my heart aches missing him every day, I’m determined to celebrate what he loved the most. He was happiest spending time [at the] Australia Zoo w/ Bind iIrwin & Robert Irwin. He was my best friend, best dad, & built the best Zoo. I love you.”
Robert Irwin was almost 3 when his father died. On Saturday, he posted his own tribute with a black-and-white throwback photo of the family.