--- lx200_OnStep.cpp.org        2022-03-22 09:15:28.455583393 +0900
+++ lx200_OnStep.cpp    2022-03-27 22:17:06.412984324 +0900
@@ -4750,6 +4750,9 @@
     struct tm utm;
     time_t time_epoch;

+    memset(&ltm, 0, sizeof(ltm));
+    memset(&utm, 0, sizeof(utm));
+
     double offset = 0;
     if (getUTFOffset(&offset))
     {
@@ -4786,6 +4789,7 @@
         return false;
     }

+    ltm.tm_isdst = 0;
     // Get local time epoch in UNIX seconds
     time_epoch = mktime(&ltm);


--- lx200_TeenAstro.cpp.org     2022-03-27 22:26:58.410327111 +0900
+++ lx200_TeenAstro.cpp 2022-03-27 22:26:30.554860486 +0900
@@ -889,6 +889,9 @@
     struct tm utm;
     time_t time_epoch;

+    memset(&ltm, 0, sizeof(ltm));
+    memset(&utm, 0, sizeof(utm));
+
     double offset = 0;

     if (getUTFOffset(&offset))
@@ -926,6 +929,7 @@
         return false;
     }

+    ltm.tm_isdst = 0;
     // Get local time epoch in UNIX seconds
     time_epoch = mktime(&ltm);


--- lx200pulsar2.cpp.org        2022-03-27 22:31:34.545998360 +0900
+++ lx200pulsar2.cpp    2022-03-27 22:36:16.346826214 +0900
@@ -3362,6 +3362,8 @@
 bool LX200Pulsar2::sendScopeTime()
 {
     struct tm ltm;
+    memset(&ltm, 0, sizeof(ltm));
+
     if (isSimulation())
     {
         const time_t t = time(nullptr);
@@ -3378,6 +3380,7 @@
         ltm.tm_year -= 1900;
     }

+    ltm.tm_isdst = 0;
     // Get time epoch and convert to TimeT
     const time_t time_epoch = mktime(&ltm);
     struct tm utm;


--- lx200telescope.cpp.org      2022-03-27 22:37:29.610136268 +0900
+++ lx200telescope.cpp  2022-03-27 22:39:03.357313388 +0900
@@ -1316,6 +1316,9 @@
     struct tm utm;
     time_t time_epoch;

+    memset(&ltm, 0, sizeof(ltm));
+    memset(&utm, 0, sizeof(utm));
+
     double offset = 0;
     if (getUTFOffset(&offset))
     {
@@ -1352,6 +1355,7 @@
         return false;
     }

+    ltm.tm_isdst = 0;
     // Get local time epoch in UNIX seconds
     time_epoch = mktime(&ltm);


--- rainbow.cpp.org     2022-03-27 22:40:53.496418534 +0900
+++ rainbow.cpp 2022-03-27 22:42:08.139848888 +0900
@@ -1517,6 +1517,9 @@
     struct tm utm;
     time_t time_epoch;

+    memset(&ltm, 0, sizeof(ltm));
+    memset(&utm, 0, sizeof(utm));
+
     double offset = 0;
     if (getUTFOffset(&offset))
     {
@@ -1553,6 +1556,7 @@
         return false;
     }

+    ltm.tm_isdst = 0;
     // Get local time epoch in UNIX seconds
     time_epoch = mktime(&ltm);


--- ioptronHC8406.cpp.org       2022-03-27 22:44:09.914971845 +0900
+++ ioptronHC8406.cpp   2022-03-27 22:46:06.486181884 +0900
@@ -1157,6 +1157,9 @@
     struct tm utm;
     time_t time_epoch;

+    memset(&ltm, 0, sizeof(ltm));
+    memset(&utm, 0, sizeof(utm));
+
     if (isSimulation())
     {
         snprintf(cdate, 32, "%d-%02d-%02dT%02d:%02d:%02d", 1979, 6, 25, 3, 30, 30);
@@ -1203,6 +1206,7 @@
     ltm.tm_mday = day;
     ltm.tm_mon  = month - 1;
     ltm.tm_year = year - 1900;
+    ltm.tm_isdst = 0;

     // Get time epoch
     time_epoch = mktime(&ltm);


--- evalINDI.c.org      2022-03-27 23:09:26.564966869 +0900
+++ evalINDI.c  2022-03-27 23:10:56.652371311 +0900
@@ -512,6 +512,7 @@
     {
         tm.tm_mon -= 1;     /* want 0..11 */
         tm.tm_year -= 1900; /* want years since 1900 */
+        tm.tm_isdst = 0;
         return (mktime(&tm));
     }
     else