How do libraries in different programming languages handle Date & Time, Timestamps & Durations, Leapseconds & -years, DSTs & Timezones, …?

Question

Is there a standard body or a specific normative way how time-related things should be implemented in practice (like ICU for Unicode-related tasks) or is this curre

Answer 1

To answer your "Good Example" question, take a look at Noda Time - Jon Skeet's port of the Joda-Time libraries for Java to .Net