Partly due to my timesheet program not accepting a dash as a minus sign, I ended up researching all kinds of interesting information about minus signs, em-dashes, and typography in gherneral.
This page does a wonderful job explaining the differences between the different minus signs and their names, and even shows what they look like in regular print. https://jakubmarian.com/hyphen-minus-en-dash-and-em-dash-difference-and-usage-in-english/
A great discussion about this that includes not only the coding perspective but an answer that shows it from a typesetting perspecitve. Surprsingly, the different dashes have different heights! https://graphicdesign.stackexchange.com/questions/68674/what-s-the-right-character-for-a-minus-sign
