if it's so important for you to have the exact date your content was created/finished on your website, rather than the date it was published, why do your song dates still show the same day as the videos? Clearly you have to finish them one or two days early for them to come out the same day as the videos. For example "just did a bad thing" came out today, 12/17 but you will probably list it as 12/18 in the song page. What gives?
almost everything in existence has a range of dates that are significant for it. for example, these questions have 2 dates/times that would be significant: the time you asked it, and the time i answered it. (actually this question seems to have 3 dates associated with it, because it appears to be copied from a question composed around 12/17) but for simplicity's sake i must choose 1 date which i think is most appropriate, based on the type of content it is. showing 2 or more dates for 1 thing is just too many numbers to take in, and does not appear clear at all. so depending on what type of content it is, the date which i feel best represents that piece of content may be derived a different way. the making of this website has been an ongoing attempt to organize things as clearly as i can, but again and again the reality will defy the categorization system in subtle ways. but i can hardly complain about that because that's just something our world loves to do. also the song was released on 12/18 not 12/17. but with advanced technology it may have been transmitted to you from a more easterly time zone which may have reached 12/18 sooner than you