The time follow the `hh:mm` format (ie 23:59). The duration uses the `h` of hour or the `min` of minute as separator (ie 1h13 or 6min). The distance uses metric units, the km or meter format (ie 1.03km or 1m). To Minimize the room for confusion, it is recommended to always use 24h format in duration, and to always pad the hour with 0 if needed: Do NOT: 3:45, instead DO: 03:45. This makes the time pattern instantly recognizable. '00:00' To further minimize confusion, and increase visual distinction between duration and instant representation, spacing can be added to the duration: 3h 45m, instead do: 3h45m. If you also display distances around duration, it is recommended to use the m for meters and min for minutes. The shorthands min of minutes and the m of meters works without the need for translation in at least 4 languages, de, en, fr and nl. For the h of hour, it is a bit more complex 'h' work in en and fr, but in german it is Stunde (s) and in dutch it is uur (u). That said, in the context of a compact ui, we recommend keeping a 'h' for hour as it is the (non-official, but widely used) international symbol/shorthand for hour.
(source: https://en.wikipedia.org/wiki/International_System_of_Units#Related_units)