diff --git a/wxdata/source/scwx/awips/coded_time_motion_location.cpp b/wxdata/source/scwx/awips/coded_time_motion_location.cpp
index 61e5ba27..ebf8cdf7 100644
--- a/wxdata/source/scwx/awips/coded_time_motion_location.cpp
+++ b/wxdata/source/scwx/awips/coded_time_motion_location.cpp
@@ -107,7 +107,7 @@ bool CodedTimeMotionLocation::Parse(const StringRange& lines,
       {
          using namespace std::chrono;
 
-#if !defined(_MSC_VER)
+#if !(defined(_MSC_VER) || defined(__clang__))
          using namespace date;
 #endif
 
diff --git a/wxdata/source/scwx/awips/pvtec.cpp b/wxdata/source/scwx/awips/pvtec.cpp
index a661a037..8152500e 100644
--- a/wxdata/source/scwx/awips/pvtec.cpp
+++ b/wxdata/source/scwx/awips/pvtec.cpp
@@ -143,7 +143,7 @@ bool PVtec::Parse(const std::string& s)
 {
    using namespace std::chrono;
 
-#if !defined(_MSC_VER)
+#if !(defined(_MSC_VER) || defined(__clang__))
    using namespace date;
 #endif
 
diff --git a/wxdata/source/scwx/gr/placefile.cpp b/wxdata/source/scwx/gr/placefile.cpp
index 1806cdfe..87167189 100644
--- a/wxdata/source/scwx/gr/placefile.cpp
+++ b/wxdata/source/scwx/gr/placefile.cpp
@@ -284,7 +284,7 @@ void Placefile::Impl::ProcessLine(const std::string& line)
       {
          using namespace std::chrono;
 
-#if !defined(_MSC_VER)
+#if !(defined(_MSC_VER) || defined(__clang__))
          using namespace date;
 #endif
 
diff --git a/wxdata/source/scwx/network/dir_list.cpp b/wxdata/source/scwx/network/dir_list.cpp
index 3c6dabd4..24a61c6e 100644
--- a/wxdata/source/scwx/network/dir_list.cpp
+++ b/wxdata/source/scwx/network/dir_list.cpp
@@ -200,7 +200,7 @@ void DirListSAXHandler::Characters(void* userData, const xmlChar* ch, int len)
    {
       using namespace std::chrono;
 
-#if !defined(_MSC_VER)
+#if !(defined(_MSC_VER) || defined(__clang__))
       using namespace date;
 #endif
 
diff --git a/wxdata/source/scwx/provider/aws_level2_data_provider.cpp b/wxdata/source/scwx/provider/aws_level2_data_provider.cpp
index 6ac939c0..ed83a590 100644
--- a/wxdata/source/scwx/provider/aws_level2_data_provider.cpp
+++ b/wxdata/source/scwx/provider/aws_level2_data_provider.cpp
@@ -82,7 +82,7 @@ AwsLevel2DataProvider::GetTimePointFromKey(const std::string& key)
    {
       using namespace std::chrono;
 
-#if !defined(_MSC_VER)
+#if !(defined(_MSC_VER) || defined(__clang__))
       using namespace date;
 #endif
 
diff --git a/wxdata/source/scwx/provider/aws_level3_data_provider.cpp b/wxdata/source/scwx/provider/aws_level3_data_provider.cpp
index 901eb41d..7d159703 100644
--- a/wxdata/source/scwx/provider/aws_level3_data_provider.cpp
+++ b/wxdata/source/scwx/provider/aws_level3_data_provider.cpp
@@ -110,7 +110,7 @@ AwsLevel3DataProvider::GetTimePointFromKey(const std::string& key)
    {
       using namespace std::chrono;
 
-#if !defined(_MSC_VER)
+#if !(defined(_MSC_VER) || defined(__clang__))
       using namespace date;
 #endif
 
diff --git a/wxdata/source/scwx/provider/warnings_provider.cpp b/wxdata/source/scwx/provider/warnings_provider.cpp
index d187763a..e8a8c3ad 100644
--- a/wxdata/source/scwx/provider/warnings_provider.cpp
+++ b/wxdata/source/scwx/provider/warnings_provider.cpp
@@ -73,7 +73,7 @@ WarningsProvider::ListFiles(std::chrono::system_clock::time_point newerThan)
 {
    using namespace std::chrono;
 
-#if !defined(_MSC_VER)
+#if !(defined(_MSC_VER) || defined(__clang__))
    using namespace date;
 #endif
 
diff --git a/wxdata/source/scwx/util/time.cpp b/wxdata/source/scwx/util/time.cpp
index 5cf091fe..52ff076f 100644
--- a/wxdata/source/scwx/util/time.cpp
+++ b/wxdata/source/scwx/util/time.cpp
@@ -59,7 +59,7 @@ std::string TimeString(std::chrono::system_clock::time_point time,
 {
    using namespace std::chrono;
 
-#if defined(_MSC_VER)
+#if !(defined(_MSC_VER) || defined(__clang__))
 #   define FORMAT_STRING_24_HOUR "{:%Y-%m-%d %H:%M:%S %Z}"
 #   define FORMAT_STRING_12_HOUR "{:%Y-%m-%d %I:%M:%S %p %Z}"
    namespace date = std::chrono;
@@ -128,7 +128,7 @@ TryParseDateTime(const std::string& dateTimeFormat, const std::string& str)
 {
    using namespace std::chrono;
 
-#if !defined(_MSC_VER)
+#if !(defined(_MSC_VER) || defined(__clang__))
    using namespace date;
 #endif