[Jarwain]

Too late to edit buuut

There's a standard! (for time intervals, and I could see it working here)[0]

> Section 3.2.6 of ISO 8601-1:2019 notes that "A solidus may be replaced by a double hyphen ["--"] by mutual agreement of the communicating partners",

So forget what I said; why exacerbate the standards problem?[1]

[0]https://en.wikipedia.org/wiki/ISO_8601#Time_intervals [1]https://xkcd.com/927/