EPUB 3.4 publication history Date Status 14 July 2025 Working Draft 28 June 2025 Working Draft 27 June 2025 Working Draft 26 June 2025 Working Draft 25 June 2025 Working Draft 9 June 2025 Working Draft 3 June 2025 Working Draft 22 May 2025 Working Draft 14 May 2025 Working Draft 2 May 2025 Working Draft 25 April 2025 Working Draft 24 April 2025 Working Draft 17 April 2025 Working Draft 27 March 2025 First Public Working Draft