I manage the Facebook page for an Orchestra, and the plain text format of the event description makes it difficult to create a readable listing. I'd like to be able to use bold, italics, bullets, etc., in the description of these Facebook events. Is there any way to do this (or perhaps even include arbitrary HTML)?
There isn't a way to add formatting to the event description; it does not accept HTML markup. If you have event details that you want formatted in a certain way, I suggest putting the details on a separate web page and pasting the URL into the event description, or post a link on the event's wall. It will open in a separate tab when clicked.
Although you cannot add formatting in the traditional sense using HTML markup you can apply some formatting by using unicode character. The easiest way I know to do this is with yaytext.com. The following is their description of what you can do:
YayText Super cool unicode text magic. Write 𝐛𝐨𝐥𝐝 and/or 𝑖𝑡𝑎𝑙𝑖𝑐 updates on Facebook, Twitter, and elsewhere. This tool generates bold and italic text using unicode characters (𝐥𝐢𝐤𝐞 𝐭𝐡𝐢𝐬, 𝘁𝗵𝗶𝘀, 𝑡ℎ𝑖𝑠, 𝘵𝘩𝘪𝘴... etc.) While the text it generates may look similar to text generated using the HTML or tags or the CSS attributes font-weight: bold or font-style: italic, it isn't.
You can copy and paste this text into email or use it in your Facebook and Twitter status updates, YouTube comments, etc. Bold and italics are often used to emphasize a point. Bold text can also be used to help structure larger bodies of text, for example, to denote a subject, heading, or title.