diff --git a/README.md b/README.md
index 566b3e5c8bdf70e06bf13af644b21260b5f87164..fafcdc8321aab717d0d900819bdd1e7b974e20a2 100644
--- a/README.md
+++ b/README.md
@@ -133,7 +133,9 @@ cmake .. -G "NMake Makefiles"
 nmake
 ```
 
-If you use the Visual Studio 2019, please open a command window by executing "cmd.exe".
+If you use the Visual Studio 2019 or 2017:
+
+please open a command window by executing "cmd.exe".
 Please specify "x64" for 64 bits Windows or specify "x86" is for 32 bits Windows when you execute vcvarsall.bat.
 ```
 mkdir debug && cd debug
@@ -142,7 +144,7 @@ cmake .. -G "NMake Makefiles"
 nmake
 ```
 
-Or, you can open a command window by clicking Visual Studio 2019 menu "Tools -> Command Line -> Developer Command Prompt" or "Tools -> Command Line -> Developer PowerShell" then execute commands as follows:
+Or, you can simply open a command window by clicking Windows Start -> "Visual Studio < 2019 | 2017 >" folder -> "x64 Native Tools Command Prompt for VS < 2019 | 2017 >" or "x86 Native Tools Command Prompt for VS < 2019 | 2017 >" depends what architecture your Windows is, then execute commands as follows:
 ```
 mkdir debug && cd debug
 cmake .. -G "NMake Makefiles"
diff --git a/src/os/src/detail/osTime.c b/src/os/src/detail/osTime.c
index d6877790a8362e6422f1b658732d3fc5f5e9d616..d9d070218e2a64e5f2535c073db4852b0a8960ef 100644
--- a/src/os/src/detail/osTime.c
+++ b/src/os/src/detail/osTime.c
@@ -43,7 +43,7 @@
  */
 int64_t user_mktime64(const unsigned int year0, const unsigned int mon0,
 		const unsigned int day, const unsigned int hour,
-		const unsigned int min, const unsigned int sec)
+		const unsigned int min, const unsigned int sec, int64_t timezone)
 {
   unsigned int mon = mon0, year = year0;
 
@@ -61,12 +61,6 @@ int64_t user_mktime64(const unsigned int year0, const unsigned int mon0,
   res  = res*24;
   res  = ((res + hour) * 60 + min) * 60 + sec;
 
-#ifdef _MSC_VER
-#if _MSC_VER >= 1900
-  int64_t timezone = _timezone;
-#endif
-#endif
-
   return (res + timezone);
 }
 
@@ -219,7 +213,7 @@ int32_t parseTimeWithTz(char* timestr, int64_t* time, int32_t timePrec) {
 
 /* mktime will be affected by TZ, set by using taos_options */
 #ifdef WINDOWS
-  int64_t seconds = user_mktime64(tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
+  int64_t seconds = user_mktime64(tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
   //int64_t seconds = gmtime(&tm); 
 #else
   int64_t seconds = timegm(&tm);
@@ -276,7 +270,13 @@ int32_t parseLocaltime(char* timestr, int64_t* time, int32_t timePrec) {
     return -1;
   }
 
-  int64_t seconds = user_mktime64(tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
+#ifdef _MSC_VER
+#if _MSC_VER >= 1900
+  int64_t timezone = _timezone;
+#endif
+#endif
+
+  int64_t seconds = user_mktime64(tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, timezone);
   
   int64_t fraction = 0;
 
@@ -574,4 +574,4 @@ const char* fmtts(int64_t ts) {
   }
 
   return buf;
-}
\ No newline at end of file
+}