diff --git a/include/fmt/core.h b/include/fmt/core.h
index 6fd2a3f6..0c2eaeea 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -439,11 +439,6 @@ template <typename Char> class basic_string_view {
 using string_view = basic_string_view<char>;
 using wstring_view = basic_string_view<wchar_t>;
 
-#ifndef __cpp_char8_t
-// char8_t is deprecated; use char instead.
-using char8_t FMT_DEPRECATED_ALIAS = internal::char8_type;
-#endif
-
 /** Specifies if ``T`` is a character type. Can be specialized by users. */
 template <typename T> struct is_char : std::false_type {};
 template <> struct is_char<char> : std::true_type {};
@@ -613,12 +608,6 @@ class basic_format_parse_context : private ErrorHandler {
 using format_parse_context = basic_format_parse_context<char>;
 using wformat_parse_context = basic_format_parse_context<wchar_t>;
 
-template <typename Char, typename ErrorHandler = internal::error_handler>
-using basic_parse_context FMT_DEPRECATED_ALIAS =
-    basic_format_parse_context<Char, ErrorHandler>;
-using parse_context FMT_DEPRECATED_ALIAS = basic_format_parse_context<char>;
-using wparse_context FMT_DEPRECATED_ALIAS = basic_format_parse_context<wchar_t>;
-
 template <typename Context> class basic_format_arg;
 template <typename Context> class basic_format_args;
 
@@ -889,10 +878,9 @@ template <typename Char> struct named_arg_value {
 };
 
 template <typename Context> struct custom_value {
-  using parse_context = basic_format_parse_context<typename Context::char_type>;
+  using parse_context = typename Context::parse_context_type;
   const void* value;
-  void (*format)(const void* arg,
-                 typename Context::parse_context_type& parse_ctx, Context& ctx);
+  void (*format)(const void* arg, parse_context& parse_ctx, Context& ctx);
 };
 
 // A formatting argument value.
diff --git a/include/fmt/format.h b/include/fmt/format.h
index 42da5be9..0d9dd0e6 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -43,10 +43,6 @@
 
 #include "core.h"
 
-#ifdef FMT_DEPRECATED_INCLUDE_OS
-#  include "os.h"
-#endif
-
 #ifdef __INTEL_COMPILER
 #  define FMT_ICC_VERSION __INTEL_COMPILER
 #elif defined(__ICL)
@@ -590,26 +586,6 @@ class buffer_range : public internal::output_range<
       : internal::output_range<iterator, T>(std::back_inserter(buf)) {}
 };
 
-class FMT_DEPRECATED u8string_view
-    : public basic_string_view<internal::char8_type> {
- public:
-  u8string_view(const char* s)
-      : basic_string_view<internal::char8_type>(
-            reinterpret_cast<const internal::char8_type*>(s)) {}
-  u8string_view(const char* s, size_t count) FMT_NOEXCEPT
-      : basic_string_view<internal::char8_type>(
-            reinterpret_cast<const internal::char8_type*>(s), count) {}
-};
-
-#if FMT_USE_USER_DEFINED_LITERALS
-inline namespace literals {
-FMT_DEPRECATED inline basic_string_view<internal::char8_type> operator"" _u(
-    const char* s, std::size_t n) {
-  return {reinterpret_cast<const internal::char8_type*>(s), n};
-}
-}  // namespace literals
-#endif
-
 // The number of characters to store in the basic_memory_buffer object itself
 // to avoid dynamic memory allocation.
 enum { inline_buffer_size = 500 };
@@ -2702,10 +2678,6 @@ FMT_CONSTEXPR basic_string_view<Char> compile_string_to_view(
  */
 #define FMT_STRING(s) FMT_STRING_IMPL(s, )
 
-#if defined(FMT_STRING_ALIAS) && FMT_STRING_ALIAS
-#  define fmt(s) FMT_STRING_IMPL(s, [[deprecated]])
-#endif
-
 template <typename... Args, typename S,
           enable_if_t<(is_compile_string<S>::value), int>>
 void check_format_string(S format_str) {
@@ -2743,12 +2715,6 @@ FMT_API void report_error(format_func func, int error_code,
                           string_view message) FMT_NOEXCEPT;
 }  // namespace internal
 
-template <typename Range>
-using basic_writer FMT_DEPRECATED_ALIAS = internal::basic_writer<Range>;
-using writer FMT_DEPRECATED_ALIAS = internal::writer;
-using wwriter FMT_DEPRECATED_ALIAS =
-    internal::basic_writer<buffer_range<wchar_t>>;
-
 /** The default argument formatter. */
 template <typename Range>
 class arg_formatter : public internal::arg_formatter_base<Range> {
diff --git a/test/format-impl-test.cc b/test/format-impl-test.cc
index e40ad907..d7f9abfe 100644
--- a/test/format-impl-test.cc
+++ b/test/format-impl-test.cc
@@ -426,9 +426,6 @@ TEST(FormatTest, FormatErrorCode) {
 }
 
 TEST(FormatTest, CountCodePoints) {
-#ifndef __cpp_char8_t
-  using fmt::char8_t;
-#endif
   EXPECT_EQ(
       4, fmt::internal::count_code_points(
              fmt::basic_string_view<fmt::internal::char8_type>(