Ozzy Osbourne’s youngest son Jack is opening up about the heartbreaking moment he learned his father had died.

The late rocker died of a heart attack at his home in Buckinghamshire, England, in July. Now, weeks later, Jack is sharing the personal story of how he found out about his father’s death in a video posted to his YouTube channel on Wednesday.

“It’s been six weeks since my father passed,” Jack recalled, after addressing concerns from his followers, which he admits “has not been” his “priority”.

He went on to share that his father passed around “10 o’ clock in the morning, U.K. time”. At the time, Jack was in Los Angeles, where he had been staying for “about a week” following his dad’s final performance.

On 5 July, Ozzy performed what would be his last show at Villa Park in Birmingham, England. Jack stayed behind with his family and children, calling it “an amazing week”.

“My family and I were scheduled to go on vacation on 7 July,” he then shared.

But their plans changed when all his kids came down with a stomach virus that Jack describes as “really gross”. The illness forced the family to postpone their trip – giving Jack unexpected, treasured time with his father. He shared that during that week, Ozzy had been in good spirits on a daily basis.

Looking back, he jokingly said he was “so grateful” his kids had the stomach flu.

After leaving on 13 July, he received the news. “I woke up in Los Angeles to a knock on my house door at around 3:45 in the morning [from] someone who has worked for my family for God [about] 30 years now was knocking on my door,” Jack recalled.

Once he realised who it was, he said he “knew something bad had happened,” and he was soon informed his dad had died. What followed was a wave of “sadness” and “pain”.

Jack said he “wishes” Ozzy was still here, but finds comfort in knowing that he’s no longer “suffering anymore.”

“No one expected it to happen as quickly as it did and when it did,” Jack said.