Hi, Does Boost.Date_Time support leap seconds? The documentation does not say it clearly enough, and it implies both answers: + The Motivation section says that we should prefer Boost.DateTime to other time libraries, because other libraries don't support leap seconds. + The documentation and function names often mention "UTC" or "universal", which by definition supports leap seconds. - The name "Posix Time" implies no support for leap seconds. At least this is what Wikipaedia says. - The rationale at the end says that leap seconds would be difficult to implement. - My experiments with simple ptime subtraction suggest no leap second support. I am really confused. Regards, &rzej