I have a time interval, say, 12600, which is equivalent to 3 hours 30 minutes. How could I format any such time interval so that only the highest part of the interval (for example in this case figure, the hours) is kept and have the correct locale abbreviation be appended to the number. For example 10m (10 minutes), 3d (3 days), 1y (1 years).
EDIT: Here are some examples:
Time interval in: 90000 Whole string: 1d String out: 1d Time interval in: 900 Whole string: 15m String out: 15m Time interval in: 13500 Whole String: 3h 45m String out: 4h
As a general rule, apply the normal rounding rules (3.4 rounds down, 3.6 rounds up).