Time Interfaces, Classes and Traits Day Day unit data class. Hour Hour unit data class. Microsecond Microsecond unit data class. Millisecond Millisecond unit data class. Minute Minute unit data class. Month Month unit data class. Nanosecond Nanosecond unit data class. Second Second unit data class. TimeUnit Time base class, new time classes should be extending this class implenting their name, symbol and units Only override $unitOf and $base properties when necessary Week Week unit data class. Year Year unit data class.