How to display duration (HH:MM) so it isn’t confusing?
Reading Time – 5 min. Label the units. "2:30" reads as half past two just as easily as two and a half hours, so anywhere a duration could be mistaken for a clock time, write "2h 30m" or "2 hr 30 min" instead. Keep the HH:MM form only where the context makes it unmistakable — a video scrubber, a timesheet column with a header that says so — and never put a duration and a timestamp in the same column.
