Time_sig

# Module Time_sig

    module Time_sig: sig .. end

Time interface. A time may be seen as a triple (hour, minute, second).

If minutes and seconds do not belong to `[0; 60[`, they are coerced into this interval.
Example: "30 hours, 60 minutes, 80 seconds" is coerced to "31 hours, 1 minute, 20 seconds".

Each time is interpreted in the current time zone (given by `Time_Zone.current ()`). So, if you change the time zone (by `Time_Zone.change`), each time consequently changes. If you want to express a time in another time zone (and do not affect others times), use the `convert` function.

    module type Second = sig .. end

Interface for seconds.

    module type S = sig .. end

Common operations for all time representations.