TLDR: It sucks balls use Jodatime
Edit: I was wrong my bad
Edit: I was wrong my bad
Are there any such plans for .NET and NodaTime? They have a more "everything is a package"-philosophy these days, but sensible dates and times really ought to be right in the corlib, especially since the bad dates and time apis are already there.
JSR-310 was developed in large parts by the author of Joda, more than based on Joda it's also based on lessons learned from Joda.
Some of the back end systems are still on 1.2.
Something about "no money for licenses and upgrades" on items that use Java.
Not too many in-house developers, aka zero, want to touch that core system.