1.16.2

Fix: usage with AMD/RequireJS was broken (#6 by @MakullaMa)

1.16.1

Fix: decimal zeroes were trimmed incorrectly (0.3012 was formatted as 3%)

1.16

Fix: format strings like %yy were interpreted as yy whereas .NET interprets it as y""y
Updates from upstream (rounding/precision issues; custom date/time specifiers: y, yyy, yyyy, yyyyy)

1.13

Support single custom date/time format specifiers: {0:%h}
Support custom date/time specifiers: offset (z, zz, zzz), fractional seconds (f, FF, etc.)
Update from the upstream (fix: midnight and noon was incorrectly formatted when using 12-hour clock)

1.12

Update from the upstream (fix: removed infinity loop when using the G format specifier with a zero value.)

1.11

Pulled updates from the upstream (v1.11, read more).
Added the ability to run the tests on Node.js.

1.10 (fork)

Bug fix: genitive forms for months (needed for Slavic languages)
Added support for AMD and CommonJS. The global object and other native objects such as String aren't modified if the library is loaded via AMD or CommonJS.
The sffjs object is a function now. It's the same function that is assigned to String.format.

The pre-fork change log is available here.