Continuing from this post and the relevant responses:     I would not know how to input a character that is not in use any more, nor would I know if it has a phonetic. But you can find it in the sources that I researched back in 2008 and that I mention in my article: "What we do know is that  is the name of a certain sacrifice (甲骨文字典, p. 995; 新編甲骨文字典, p. 528)." Most research on this character is summarized in 古文字诂林, Vol. 8, p. 53-57.   I wrote the article in 2008 and maybe there are new developments that I am not yet aware of. I do however maintain that 易 is not composed of both the characters 日 and 月. The oldest forms do not show 日 but they do show 月 as a component.