Is there support for December 25 as Jesus' birthdate prior to the Council of Nicaea?

A book on the origins of the Christmas holiday came out earlier this year, Jozef Naumowicz's The Origin Of The Feast Of The Nativity In The Patristic Perspective (Berlin, Germany: Peter Lang GmbH, 2024). A section of the book describing the author refers to Naumowicz as "a member of the Committee of Historical Sciences of the Polish Academy of Sciences. He is the author and editor of many publications in the field of ancient Christianity and patrology, as well as the editor of the Library of the Church Fathers series." He argues that the December 25 date for Jesus' birth and the celebration of his birth on that day aren't found in any source prior to the Council of Nicaea, but he also argues that the date and the holiday weren't influenced by paganism in any significant way. So, he assigns a late date to the holiday, but denies that it's pagan or an attempt to compete with paganism. I disagree with him on the first point, but agree with him on the second. I'll explain why I disagree with him in this post, then I'll cite some of his comments where I agree with him in a later post. The book is worth getting for his material on the pagan influence issue, even if you disagree with him on the dating of the December 25 date and the holiday.