Added support for the %j specifier (the number of days) for std::chrono::duration (https://github.com/fmtlib/fmt/issues/3643, https://github.com/fmtlib/fmt/pull/3732). Thanks @intelfx.

Added support for the chrono suffix for days and changed the suffix for minutes from "m" to the correct "min" (https://github.com/fmtlib/fmt/issues/3662, https://github.com/fmtlib/fmt/pull/3664). For example (godbolt):

#include <fmt/chrono.h>

int main() {
  fmt::print("{}\n", std::chrono::days(42)); // prints "42d"
}

Thanks @Richardk2n.

Fixed an overflow in std::chrono::time_point formatting with large dates (https://github.com/fmtlib/fmt/issues/3725, https://github.com/fmtlib/fmt/pull/3727). Thanks @cschreib.

Added a formatter for std::source_location (https://github.com/fmtlib/fmt/pull/3730). For example (godbolt):

#include <source_location>
#include <fmt/std.h>

int main() {
  fmt::print("{}\n", std::source_location::current());
}

prints

/app/example.cpp:5:51: int main()

Thanks @felix642.

Added a formatter for std::bitset (https://github.com/fmtlib/fmt/pull/3660). For example (godbolt):

#include <bitset>
#include <fmt/std.h>

int main() {
  fmt::print("{}\n", std::bitset<6>(42)); // prints "101010"
}

Thanks @muggenhor.

Added an experimental nested_formatter that provides an easy way of applying a formatter to one or more subobjects while automatically handling width, fill and alignment. For example:

#include <fmt/format.h>

struct point {
  double x, y;
};

template <>
struct fmt::formatter<point> : nested_formatter<double> {
  auto format(point p, format_context& ctx) const {
    return write_padded(ctx, [=](auto out) {
      return format_to(out, "({}, {})", nested(p.x), nested(p.y));
    });
  }
};

int main() {
  fmt::print("[{:>20.2f}]", point{1, 2});
}

prints

[          (1.00, 2.00)]

Added the generic representation (g) to std::filesystem::path (https://github.com/fmtlib/fmt/issues/3715, https://github.com/fmtlib/fmt/pull/3729). For example:

#include <filesystem>
#include <fmt/std.h>

int main() {
  fmt::print("{:g}\n", std::filesystem::path("C:\\foo"));
}

prints "C:/foo" on Windows.

Thanks @js324.

Made format_as work with references (https://github.com/fmtlib/fmt/pull/3739). Thanks @tchaikov.

Fixed formatting of invalid UTF-8 with precision (https://github.com/fmtlib/fmt/issues/3284).

Fixed an inconsistency between fmt::to_string and fmt::format (https://github.com/fmtlib/fmt/issues/3684).

Disallowed unsafe uses of fmt::styled (https://github.com/fmtlib/fmt/issues/3625):

auto s = fmt::styled(std::string("dangle"), fmt::emphasis::bold);
fmt::print("{}\n", s); // compile error

Pass fmt::styled(...) as a parameter instead.

Added a null check when formatting a C string with the s specifier (https://github.com/fmtlib/fmt/issues/3706).

Disallowed the c specifier for bool (https://github.com/fmtlib/fmt/issues/3726, https://github.com/fmtlib/fmt/pull/3734). Thanks @js324.

Made the default formatting unlocalized in fmt::ostream_formatter for consistency with the rest of the library (https://github.com/fmtlib/fmt/issues/3460).

Fixed localized formatting in bases other than decimal (https://github.com/fmtlib/fmt/issues/3693, https://github.com/fmtlib/fmt/pull/3750). Thanks @js324.

Fixed a performance regression in experimental fmt::ostream::print (https://github.com/fmtlib/fmt/issues/3674).

Added synchronization with the underlying output stream when writing to the Windows console (https://github.com/fmtlib/fmt/pull/3668, https://github.com/fmtlib/fmt/issues/3688, https://github.com/fmtlib/fmt/pull/3689). Thanks @Roman-Koshelev and @dimztimz.

Changed to only export format_error when {fmt} is built as a shared library (https://github.com/fmtlib/fmt/issues/3626, https://github.com/fmtlib/fmt/pull/3627). Thanks @phprus.

Made fmt::streamed constexpr. (https://github.com/fmtlib/fmt/pull/3650). Thanks @muggenhor.

Enabled consteval on older versions of MSVC (https://github.com/fmtlib/fmt/pull/3757). Thanks @phprus.

Added an option to build without wchar_t support on Windows (https://github.com/fmtlib/fmt/issues/3631, https://github.com/fmtlib/fmt/pull/3636). Thanks @glebm.

Improved build and CI configuration (https://github.com/fmtlib/fmt/pull/3679, https://github.com/fmtlib/fmt/issues/3701, https://github.com/fmtlib/fmt/pull/3702, https://github.com/fmtlib/fmt/pull/3749). Thanks @jcar87, @pklima and @tchaikov.

Fixed various warnings, compilation and test issues (https://github.com/fmtlib/fmt/issues/3607, https://github.com/fmtlib/fmt/pull/3610, https://github.com/fmtlib/fmt/pull/3624, https://github.com/fmtlib/fmt/pull/3630, https://github.com/fmtlib/fmt/pull/3634, https://github.com/fmtlib/fmt/pull/3638, https://github.com/fmtlib/fmt/issues/3645, https://github.com/fmtlib/fmt/issues/3646, https://github.com/fmtlib/fmt/pull/3647, https://github.com/fmtlib/fmt/pull/3652, https://github.com/fmtlib/fmt/issues/3654, https://github.com/fmtlib/fmt/pull/3663, https://github.com/fmtlib/fmt/issues/3670, https://github.com/fmtlib/fmt/pull/3680, https://github.com/fmtlib/fmt/issues/3694, https://github.com/fmtlib/fmt/pull/3695, https://github.com/fmtlib/fmt/pull/3699, https://github.com/fmtlib/fmt/issues/3705, https://github.com/fmtlib/fmt/issues/3710, https://github.com/fmtlib/fmt/issues/3712, https://github.com/fmtlib/fmt/pull/3713, https://github.com/fmtlib/fmt/issues/3714, https://github.com/fmtlib/fmt/pull/3716, https://github.com/fmtlib/fmt/pull/3723, https://github.com/fmtlib/fmt/issues/3738, https://github.com/fmtlib/fmt/issues/3740, https://github.com/fmtlib/fmt/pull/3741, https://github.com/fmtlib/fmt/pull/3743, https://github.com/fmtlib/fmt/issues/3745, https://github.com/fmtlib/fmt/pull/3747, https://github.com/fmtlib/fmt/pull/3748, https://github.com/fmtlib/fmt/pull/3751, https://github.com/fmtlib/fmt/pull/3754, https://github.com/fmtlib/fmt/pull/3755, https://github.com/fmtlib/fmt/issues/3760, https://github.com/fmtlib/fmt/pull/3762, https://github.com/fmtlib/fmt/issues/3763, https://github.com/fmtlib/fmt/pull/3764, https://github.com/fmtlib/fmt/issues/3774, https://github.com/fmtlib/fmt/pull/3779). Thanks @danakj, @vinayyadav3016, @cyyever, @phprus, @qimiko, @saschasc, @gsjaardema, @lazka, @Zhaojun-Liu, @carlsmedstad, @hotwatermorning, @cptFracassa, @kuguma, @PeterJohnson, @H1X4Dev, @asantoni, @eltociear, @msimberg, @tchaikov, @waywardmonkeys.

Improved documentation and README (https://github.com/fmtlib/fmt/issues/2086, https://github.com/fmtlib/fmt/issues/3637, https://github.com/fmtlib/fmt/pull/3642, https://github.com/fmtlib/fmt/pull/3653, https://github.com/fmtlib/fmt/pull/3655, https://github.com/fmtlib/fmt/pull/3661, https://github.com/fmtlib/fmt/issues/3673, https://github.com/fmtlib/fmt/pull/3677, https://github.com/fmtlib/fmt/pull/3737, https://github.com/fmtlib/fmt/issues/3742, https://github.com/fmtlib/fmt/pull/3744). Thanks @idzm, @perlun, @joycebrum, @fennewald, @reinhardt1053, @GeorgeLS.

Updated CI dependencies (https://github.com/fmtlib/fmt/pull/3615, https://github.com/fmtlib/fmt/pull/3622, https://github.com/fmtlib/fmt/pull/3623, https://github.com/fmtlib/fmt/pull/3666, https://github.com/fmtlib/fmt/pull/3696, https://github.com/fmtlib/fmt/pull/3697, https://github.com/fmtlib/fmt/pull/3759, https://github.com/fmtlib/fmt/pull/3782).