Each time I see a programming language upgrade its base library to improve date/time handling, they all look eerily similar to the Java open source library Joda

Each time I see a programming language upgrade its base library to improve date/time handling, they all look eerily similar to the Java open source library JodaTime, which eventually became JSR-310 (essentially the "2.0" version of JodaTime in the Java base library). Does anyone else notice this? Except for leap seconds, I have never seen a real world business problem that I cannot solve with the current Java date/time APIs.