An exceptional registration period has been set up this year, due to the Club World Cup being held in the United States.
In order to not allow any advantage to the sides participating later this month, including Chelsea and Manchester City from the Premier League, all top-flight and EFL clubs are free to sign players during the short window.
The first window closes at 19:00 BST on Tuesday 10 June.
There is a pause in transfer activity until Monday 16 June, before it reopens for the main business to unfold, in preparation for 2025/26 campaign, which kicks off on or around Saturday 16 August.