Manchester United finally accepted a bid from Real Madrid for the Portuguese forward in an ongoing transfer saga which looks set to end this month.
The proposed £80million deal will break the world record set by Madrid themselves only this week when they signed Brazilian superstar Kaka from AC Milan for £59m.
Calderon, who was replaced as president with Florentino Perez this summer, has claimed he was involved in agreeing the terms during last summer's pursuit.
"Last season United decided not to do it because they thought it was too early and everyone agreed to do it this season," said Calderon.
"And I think it's okay for the player - he wanted to come, he said that many times - it's okay for Real Madrid and also for Manchester United, who will get a lot of money for the transfer."
It is believed an agreement was in place since last summer for the transfer despite new president Florentino Perez now taking the credit for the coup but Calderon refused to confirm there was anything official.
"Let's say that everyone involved in the operation agreed to do it this season," he said.
"That is what I can say. It has happened now, it was a bit early last season."
The 24-year-old is expected to agree terms with the Spanish giants as he has repeatedly expressed his ambition to play in the Primera Division and Calderon believes the move will help Madrid get back to winning honours.
"I think it's going to be big event for Real Madrid, he is one of the best players in the world. He is going to help my former club get titles next season," he said.