diff --git a/platform/uwp/os_uwp.cpp b/platform/uwp/os_uwp.cpp
index ea4f63b49c9..2498e5a7f5e 100644
--- a/platform/uwp/os_uwp.cpp
+++ b/platform/uwp/os_uwp.cpp
@@ -579,7 +579,9 @@ OS::TimeZoneInfo OSUWP::get_time_zone_info() const {
 		ret.name = info.StandardName;
 	}
 
-	ret.bias = info.Bias;
+	// Bias value returned by GetTimeZoneInformation is inverted of what we expect
+	// For example on GMT-3 GetTimeZoneInformation return a Bias of 180, so invert the value to get -180
+	ret.bias = -info.Bias;
 	return ret;
 }
 
diff --git a/platform/windows/os_windows.cpp b/platform/windows/os_windows.cpp
index 9ae1be9afda..96def5d3c1d 100644
--- a/platform/windows/os_windows.cpp
+++ b/platform/windows/os_windows.cpp
@@ -2137,7 +2137,9 @@ OS::TimeZoneInfo OS_Windows::get_time_zone_info() const {
 		ret.name = info.StandardName;
 	}
 
-	ret.bias = info.Bias;
+	// Bias value returned by GetTimeZoneInformation is inverted of what we expect
+	// For example on GMT-3 GetTimeZoneInformation return a Bias of 180, so invert the value to get -180
+	ret.bias = -info.Bias;
 	return ret;
 }