At the end of the day, it's really your choice how you do it, and my choice is that I like doing some things the professional way. On my YouTube videos, for example, every one of them, except for the early ones as I can't remember the exact dates, has this for the description: "This video was recorded on January 1, 2016." (Obviously, that's an example date.) However, my playlists just have stuff like: February 22, 2016 - March 22, 2016 or July 14, 2016 - Present, and so on. (Note: Those are regular hyphens (spaced), but I recently learned that when it comes to ranges, en-dashes are more appropriate.) In that case, I feel like it would just be too much to have something like, "This project began on February 22, 2016, and ended on March 22, 2016" or "This project began on July 14, 2016, and is still ongoing." I just feel like that's a bit much and why I don't have it like on my video descriptions. Anyway, I started changing my playlists' date range format earlier, but I stopped because I wasn't sure what the professional format for a date range is. What is the professional way to do ranges? See the poll. For the en-dash in particular with ranges, I think the professional way is without spacing. Vote!