The provided article text appears to be incomplete — it consists only of website navigation and menu elements (site sections, shop links, mailing list prompts) rather than the actual article content about the 1966 song "Turn-Down Day". No substantive information about the song, its significance, or its connection to the Beatles was included in the text supplied.

As a result, a meaningful summary cannot be produced from the available material. To provide an accurate summary, the full article text discussing "Turn-Down Day" and its relevance to the Beatles' legacy would be needed.