diff --git a/.github/workflows/build_macos.yml b/.github/workflows/build_macos.yml
new file mode 100644
index 0000000..c0d808d
--- /dev/null
+++ b/.github/workflows/build_macos.yml
@@ -0,0 +1,37 @@
+# Build from source.
+name: build_macos
+on: [push, pull_request]
+permissions: read-all
+jobs:
+  build_ubuntu:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+        - os: macos-12
+          configure_options: ''
+        - os: macos-13
+          configure_options: ''
+        - os: macos-14
+          configure_options: ''
+        - os: macos-15
+          configure_options: ''
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install build dependencies
+      run: |
+        brew update -q
+        brew install -q autoconf automake gettext gnu-sed libtool pkg-config || true
+        brew link --force gettext
+        ln -s /usr/local/bin/glibtoolize /usr/local/bin/libtoolize
+    - name: Download test data
+      run: |
+        if test -x "synctestdata.sh"; then ./synctestdata.sh; fi
+    - name: Building from source
+      env:
+        CC: ${{ matrix.compiler }}
+      run: |
+        tests/build.sh ${{ matrix.configure_options }}
+    - name: Run tests
+      run: |
+        tests/runtests.sh
diff --git a/acinclude.m4 b/acinclude.m4
index a679681..3c725c8 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1,6 +1,6 @@
 dnl Checks for required headers and functions
 dnl
-dnl Version: 20240413
+dnl Version: 20240518
 
 dnl Function to detect if libfdatetime dependencies are available
 AC_DEFUN([AX_LIBFDATETIME_CHECK_LOCAL],
diff --git a/appveyor.yml b/appveyor.yml
index bfe6013..6062ebc 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -72,7 +72,7 @@ environment:
     PYTHON_PATH: "C:\\Python311"
   - TARGET: macos-x64-clang
     BUILD_ENVIRONMENT: xcode
-    APPVEYOR_BUILD_WORKER_IMAGE: macos-monterey
+    APPVEYOR_BUILD_WORKER_IMAGE: macos-sonoma
     HOMEBREW_NO_INSTALL_CLEANUP: 1
     CC: clang
     CFLAGS: "-I/usr/local/include"
@@ -80,7 +80,7 @@ environment:
     CONFIGURE_OPTIONS: ""
   - TARGET: macos-x64-gcc
     BUILD_ENVIRONMENT: xcode
-    APPVEYOR_BUILD_WORKER_IMAGE: macos-monterey
+    APPVEYOR_BUILD_WORKER_IMAGE: macos-sonoma
     HOMEBREW_NO_INSTALL_CLEANUP: 1
     CC: gcc
     CFLAGS: "-I/usr/local/include"
@@ -88,7 +88,7 @@ environment:
     CONFIGURE_OPTIONS: ""
   - TARGET: macos-pkgbuild
     BUILD_ENVIRONMENT: xcode
-    APPVEYOR_BUILD_WORKER_IMAGE: macos-monterey
+    APPVEYOR_BUILD_WORKER_IMAGE: macos-sonoma
     HOMEBREW_NO_INSTALL_CLEANUP: 1
     CONFIGURE_OPTIONS: "--disable-dependency-tracking --prefix=/usr/local --with-pyprefix"
   - TARGET: cygwin64-gcc
diff --git a/autogen.ps1 b/autogen.ps1
index fd3f68b..f39c5f1 100644
--- a/autogen.ps1
+++ b/autogen.ps1
@@ -1,12 +1,12 @@
 # Script to generate the necessary files for a msvscpp build
 #
-# Version: 20240306
+# Version: 20241014
 
 $WinFlex = "..\win_flex_bison\win_flex.exe"
 $WinBison = "..\win_flex_bison\win_bison.exe"
 
-$Library = Get-Content -Path configure.ac | select -skip 3 -first 1 | % { $_ -Replace " \[","" } | % { $_ -Replace "\],","" }
-$Version = Get-Content -Path configure.ac | select -skip 4 -first 1 | % { $_ -Replace " \[","" } | % { $_ -Replace "\],","" }
+$Library = Get-Content -Path configure.ac | select -skip 3 -first 1 | % { $_ -Replace "  \[","" } | % { $_ -Replace "\],","" }
+$Version = Get-Content -Path configure.ac | select -skip 4 -first 1 | % { $_ -Replace "  \[","" } | % { $_ -Replace "\],","" }
 $Prefix = ${Library}.Substring(3)
 
 Get-Content -Path "include\${Library}.h.in" | Out-File -Encoding ascii "include\${Library}.h"
diff --git a/autogen.sh b/autogen.sh
index 83f54ea..bd307d2 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,32 +1,38 @@
 #!/bin/sh
-# Script to generate ./configure using the autotools
+# Script to generate configure and Makefile using the autotools.
 #
-# Version: 20230405
+# Version: 20241013
 
 EXIT_SUCCESS=0;
 EXIT_FAILURE=1;
 
-BINDIR="/usr/bin";
+BINDIR=`which aclocal`;
+BINDIR=`dirname ${BINDIR}`;
 
-if ! test -x "${BINDIR}/aclocal";
+if ! test -x "${BINDIR}/aclocal" && test "${BINDIR}" != "/usr/bin";
 then
-	BINDIR="/usr/local/bin";
+	BINDIR="/usr/bin";
 fi
-if ! test -x "${BINDIR}/aclocal";
+if ! test -x "${BINDIR}/aclocal" && test "${BINDIR}" != "/usr/local/bin";
 then
 	BINDIR="/usr/local/bin";
 fi
-if ! test -x "${BINDIR}/aclocal";
+if ! test -x "${BINDIR}/aclocal" && test "${BINDIR}" != "/opt/local/bin";
 then
 	# Default location of MacPorts installed binaries.
 	BINDIR="/opt/local/bin";
 fi
-if ! test -x "${BINDIR}/aclocal";
+if ! test -x "${BINDIR}/aclocal" && test "${BINDIR}" != "/opt/homebrew/bin";
+then
+	# Default location of Homebrew installed binaries.
+	BINDIR="/opt/homebrew/bin";
+fi
+if ! test -x "${BINDIR}/aclocal" && test "${BINDIR}" != "/mingw32/bin";
 then
 	# Default location of 32-bit MSYS2-MinGW installed binaries.
 	BINDIR="/mingw32/bin";
 fi
-if ! test -x "${BINDIR}/aclocal";
+if ! test -x "${BINDIR}/aclocal" && test "${BINDIR}" != "/mingw64/bin";
 then
 	# Default location of 64-bit MSYS2-MinGW installed binaries.
 	BINDIR="/mingw64/bin";
@@ -91,35 +97,30 @@ else
 
 		exit ${EXIT_FAILURE};
 	fi
-
 	if ! test -x "${AUTOCONF}";
 		then
 		echo "Unable to find: autoconf";
 
 		exit ${EXIT_FAILURE};
 	fi
-
 	if ! test -x "${AUTOHEADER}";
 	then
 		echo "Unable to find: autoheader";
 
 		exit ${EXIT_FAILURE};
 	fi
-
 	if ! test -x "${AUTOMAKE}";
 	then
 		echo "Unable to find: automake";
 
 		exit ${EXIT_FAILURE};
 	fi
-
 	if ! test -x "${AUTOPOINT}";
 	then
 		echo "Unable to find: autopoint";
 
 		exit ${EXIT_FAILURE};
 	fi
-
 	if ! test -x "${LIBTOOLIZE}";
 	then
 		echo "Unable to find: libtoolize";
diff --git a/configure.ac b/configure.ac
index 1af4522..ffe7492 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,12 +1,12 @@
 AC_PREREQ([2.71])
 
 AC_INIT(
- [libfdatetime],
- [20240518],
- [joachim.metz@gmail.com])
+  [libfdatetime],
+  [20241214],
+  [joachim.metz@gmail.com])
 
 AC_CONFIG_SRCDIR(
- [include/libfdatetime.h.in])
+  [include/libfdatetime.h.in])
 
 AM_INIT_AUTOMAKE([gnu 1.6 tar-ustar])
 AM_EXTRA_RECURSIVE_TARGETS([sources splint])
@@ -71,21 +71,21 @@ CFLAGS="$CFLAGS -Wall";
 
 dnl Check if requires and build requires should be set in spec file
 AS_IF(
- [test "x$ac_cv_libcerror" = xyes],
- [AC_SUBST(
-  [libfdatetime_spec_requires],
-  [Requires:])
- ])
+  [test "x$ac_cv_libcerror" = xyes],
+  [AC_SUBST(
+    [libfdatetime_spec_requires],
+    [Requires:])
+  ])
 
 dnl Set the date for the dpkg files
 AC_SUBST(
- [DPKG_DATE],
- [`date -R 2> /dev/null`])
+  [DPKG_DATE],
+  [`date -R 2> /dev/null`])
 
 dnl Set the date for the spec file
 AC_SUBST(
- [SPEC_DATE],
- [`date +"%a %b %e %Y" 2> /dev/null`])
+  [SPEC_DATE],
+  [`date +"%a %b %e %Y" 2> /dev/null`])
 
 dnl Generate Makefiles
 AC_CONFIG_FILES([Makefile])
diff --git a/libfdatetime/libfdatetime_posix_time.c b/libfdatetime/libfdatetime_posix_time.c
index c2fb0e2..e33859a 100644
--- a/libfdatetime/libfdatetime_posix_time.c
+++ b/libfdatetime/libfdatetime_posix_time.c
@@ -576,6 +576,8 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 {
 	static char *function    = "libfdatetime_internal_posix_time_copy_to_date_time_values";
 	uint64_t posix_timestamp = 0;
+	uint64_t remaining_years = 0;
+	uint32_t days_in_century = 0;
 	uint16_t days_in_year    = 0;
 	uint8_t days_in_month    = 0;
 	uint8_t is_signed        = 0;
@@ -627,7 +629,21 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 	{
 		is_signed = (uint8_t) ( posix_timestamp >> 31 );
 
-		posix_timestamp &= 0x7fffffffUL;
+		if( is_signed != 0 )
+		{
+			if( ( posix_timestamp & 0x7fffffffUL ) == 0 )
+			{
+				libcerror_error_set(
+				 error,
+				 LIBCERROR_ERROR_DOMAIN_RUNTIME,
+				 LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
+				 "%s: unsupported timestamp.",
+				 function );
+
+				return( -1 );
+			}
+			posix_timestamp = -( (int32_t) posix_timestamp );
+		}
 	}
 	else if( ( internal_posix_time->value_type == LIBFDATETIME_POSIX_TIME_VALUE_TYPE_SECONDS_64BIT_SIGNED )
 	      || ( internal_posix_time->value_type == LIBFDATETIME_POSIX_TIME_VALUE_TYPE_SECONDS_64BIT_UNSIGNED )
@@ -638,23 +654,25 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 	{
 		is_signed = (uint8_t) ( posix_timestamp >> 63 );
 
+		if( is_signed != 0 )
+		{
 #if defined( __BORLANDC__ ) && ( __BORLANDC__ < 0x0560 )
-		posix_timestamp &= 0x7fffffffffffffffUL;
+			if( ( posix_timestamp & 0x7fffffffffffffffUL ) == 0 )
 #else
-		posix_timestamp &= 0x7fffffffffffffffULL;
+			if( ( posix_timestamp & 0x7fffffffffffffffULL ) == 0 )
 #endif
-	}
-	if( ( is_signed != 0 )
-	 && ( posix_timestamp == 0 ) )
-	{
-		libcerror_error_set(
-		 error,
-		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
-		 LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
-		 "%s: unsupported timestamp.",
-		 function );
-
-		return( -1 );
+			{
+				libcerror_error_set(
+				 error,
+				 LIBCERROR_ERROR_DOMAIN_RUNTIME,
+				 LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
+				 "%s: unsupported timestamp.",
+				 function );
+
+				return( -1 );
+			}
+			posix_timestamp = -( (int64_t) posix_timestamp );
+		}
 	}
         date_time_values->nano_seconds = 0;
 
@@ -663,15 +681,14 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 	{
 		/* The timestamp is in units of nano seconds correct the value to seconds
 		 */
-		if( is_signed == 0 )
-		{
-			date_time_values->nano_seconds = posix_timestamp % 1000;
-		}
-		else
+		date_time_values->nano_seconds = posix_timestamp % 1000;
+		posix_timestamp /= 1000;
+
+		if( ( is_signed != 0 )
+		 && ( date_time_values->nano_seconds > 0 ) )
 		{
-			date_time_values->nano_seconds = 1000 - ( posix_timestamp % 1000 );
+			date_time_values->nano_seconds = 999 - date_time_values->nano_seconds;
 		}
-		posix_timestamp /= 1000;
 	}
 	if( ( internal_posix_time->value_type == LIBFDATETIME_POSIX_TIME_VALUE_TYPE_MICRO_SECONDS_64BIT_SIGNED )
 	 || ( internal_posix_time->value_type == LIBFDATETIME_POSIX_TIME_VALUE_TYPE_MICRO_SECONDS_64BIT_UNSIGNED )
@@ -680,31 +697,32 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 	{
 		/* The timestamp is in units of micro seconds correct the value to seconds
 		 */
-		if( is_signed == 0 )
-		{
-			date_time_values->micro_seconds = posix_timestamp % 1000;
-		}
-		else
-		{
-			date_time_values->micro_seconds = 1000 - ( posix_timestamp % 1000 );
-		}
+		date_time_values->micro_seconds = posix_timestamp % 1000;
 		posix_timestamp /= 1000;
 
-		if( is_signed == 0 )
+		if( ( is_signed != 0 )
+		 && ( date_time_values->micro_seconds > 0 ) )
 		{
-			date_time_values->milli_seconds = posix_timestamp % 1000;
+			date_time_values->micro_seconds = 999 - date_time_values->micro_seconds;
 		}
-		else
+		date_time_values->milli_seconds = posix_timestamp % 1000;
+		posix_timestamp /= 1000;
+
+		if( ( is_signed != 0 )
+		 && ( date_time_values->milli_seconds > 0 ) )
 		{
-			date_time_values->milli_seconds = 1000 - ( posix_timestamp % 1000 );
+			date_time_values->milli_seconds = 999 - date_time_values->milli_seconds;
 		}
-		posix_timestamp /= 1000;
 	}
 	else
 	{
 	        date_time_values->micro_seconds = 0;
 	        date_time_values->milli_seconds = 0;
 	}
+	if( is_signed != 0 )
+	{
+		posix_timestamp -= 1;
+	}
 	/* There are 60 seconds in a minute correct the value to minutes
 	 */
 	date_time_values->seconds = posix_timestamp % 60;
@@ -713,7 +731,7 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 	if( ( is_signed != 0 )
 	 && ( date_time_values->seconds > 0 ) )
 	{
-		date_time_values->seconds = 60 - date_time_values->seconds;
+		date_time_values->seconds = 59 - date_time_values->seconds;
 	}
 	/* There are 60 minutes in an hour correct the value to hours
 	 */
@@ -723,7 +741,7 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 	if( ( is_signed != 0 )
 	 && ( date_time_values->minutes > 0 ) )
 	{
-		date_time_values->minutes = 60 - date_time_values->minutes;
+		date_time_values->minutes = 59 - date_time_values->minutes;
 	}
 	/* There are 24 hours in a day correct the value to days
 	 */
@@ -733,7 +751,7 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 	if( ( is_signed != 0 )
 	 && ( date_time_values->hours > 0 ) )
 	{
-		date_time_values->hours = 24 - date_time_values->hours;
+		date_time_values->hours = 23 - date_time_values->hours;
 	}
 	/* Determine the number of years starting at 'Jan 1, 1970 00:00:00'
 	 * correct the value to days within the year
@@ -757,11 +775,70 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 	}
 	else
 	{
-		/* Remove 1 day to compensate that Jan 1, 1970 is represented as 0
+		date_time_values->year = 1969;
+	}
+	remaining_years = posix_timestamp % 100;
+
+	while( remaining_years > 0 )
+	{
+		/* Check for a leap year
+		 * The year is ( ( dividable by 4 ) and ( not dividable by 100 ) ) or ( dividable by 400 )
+		 */
+		if( ( ( ( date_time_values->year % 4 ) == 0 )
+		  &&  ( ( date_time_values->year % 100 ) != 0 ) )
+		 || ( ( date_time_values->year % 400 ) == 0 ) )
+		{
+			days_in_year = 366;
+		}
+		else
+		{
+			days_in_year = 365;
+		}
+		if( posix_timestamp <= days_in_year )
+		{
+			break;
+		}
+		posix_timestamp -= days_in_year;
+
+		if( is_signed == 0 )
+		{
+			date_time_values->year += 1;
+		}
+		else
+		{
+			date_time_values->year -= 1;
+		}
+		remaining_years -= 1;
+	}
+	while( posix_timestamp > 0 )
+	{
+		/* Check for a leap year
+		 * The year is ( ( dividable by 4 ) and ( not dividable by 100 ) ) or ( dividable by 400 )
 		 */
-		posix_timestamp -= 1;
+		if( ( ( ( date_time_values->year % 4 ) == 0 )
+		  &&  ( ( date_time_values->year % 100 ) != 0 ) )
+		 || ( ( date_time_values->year % 400 ) == 0 ) )
+		{
+			days_in_century = 36525;
+		}
+		else
+		{
+			days_in_century = 36524;
+		}
+		if( posix_timestamp <= days_in_century )
+		{
+			break;
+		}
+		posix_timestamp -= days_in_century;
 
-		date_time_values->year = 1969;
+		if( is_signed == 0 )
+		{
+			date_time_values->year += 100;
+		}
+		else
+		{
+			date_time_values->year -= 100;
+		}
 	}
 	while( posix_timestamp > 0 )
 	{
@@ -793,7 +870,6 @@ int libfdatetime_internal_posix_time_copy_to_date_time_values(
 			date_time_values->year -= 1;
 		}
 	}
-
 	/* Determine the month correct the value to days within the month
 	 */
 	if( is_signed == 0 )
diff --git a/m4/common.m4 b/m4/common.m4
index c2ea816..c229b79 100644
--- a/m4/common.m4
+++ b/m4/common.m4
@@ -1,6 +1,6 @@
 dnl Checks for common headers and functions
 dnl
-dnl Version: 20240513
+dnl Version: 20241013
 
 dnl Function to test if a certain feature was disabled
 AC_DEFUN([AX_COMMON_ARG_DISABLE],
@@ -113,7 +113,7 @@ AC_DEFUN([AX_COMMON_CHECK_ENABLE_VERBOSE_OUTPUT],
     ac_cv_enable_verbose_output=yes])
   ])
 
-dnl Function to detect whether static executables support should be enabled
+dnl Function to detect whether wide character type support should be enabled
 AC_DEFUN([AX_COMMON_CHECK_ENABLE_WIDE_CHARACTER_TYPE],
   [AX_COMMON_ARG_ENABLE(
     [wide-character-type],
diff --git a/tests/pkgbuild.sh b/tests/pkgbuild.sh
index fddfd6e..67b8bb3 100755
--- a/tests/pkgbuild.sh
+++ b/tests/pkgbuild.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 # Script to build a MacOS pkg
 #
-# Version: 20201121
+# Version: 20241015
 
 set -e
 
@@ -9,6 +9,6 @@ make install DESTDIR=${PWD}/osx-pkg
 mkdir -p ${PWD}/osx-pkg/usr/share/doc/libfdatetime
 cp AUTHORS COPYING COPYING.LESSER NEWS README ${PWD}/osx-pkg/usr/share/doc/libfdatetime
 
-VERSION=`sed '5!d; s/^ \[//;s/\],$//' configure.ac`
+VERSION=`sed '5!d; s/^  \[//;s/\],$//' configure.ac`
 pkgbuild --root osx-pkg --identifier com.github.libyal.libfdatetime --version ${VERSION} --ownership recommended ../libfdatetime-${VERSION}.pkg