diff --git a/src/Ntp.cpp b/src/Ntp.cpp
index 156184972..4d7e8cea7 100644
--- a/src/Ntp.cpp
+++ b/src/Ntp.cpp
@@ -18,6 +18,7 @@ byte             NtpClient::NTPpacket[NTP_PACKET_SIZE];
 // https://github.com/sanohin/google-timezones-json/blob/master/timezones.json
 // https://github.com/dmfilipenko/timezones.json/blob/master/timezones.json
 // https://home.kpn.nl/vanadovv/time/TZworld.html
+// https://www.timeanddate.com/time/zones/
 
 // Australia Eastern Time Zone (Sydney, Melbourne)
 TimeChangeRule aEDT = {"AEDT", First, Sun, Oct, 2, 660}; // UTC + 11 hours
@@ -26,7 +27,11 @@ Timezone       ausET(aEDT, aEST);
 
 // Moscow Standard Time (MSK, does not observe DST)
 TimeChangeRule msk = {"MSK", Last, Sun, Mar, 1, 180};
-Timezone       tzMSK(msk);
+Timezone       MSK(msk);
+
+// Turkey
+TimeChangeRule trt = {"TRT", Last, Sun, Mar, 1, 180};
+Timezone       TRT(trt);
 
 // Central European Time (Frankfurt, Paris)
 TimeChangeRule CEST = {"CEST", Last, Sun, Mar, 2, 120}; // Central European Summer Time
@@ -66,14 +71,14 @@ TimeChangeRule usPST = {"PST", First, Sun, Nov, 2, -480};
 Timezone       usPT(usPDT, usPST);
 
 // build index of all timezones
-Timezone * timezones[] = {&ausET, &tzMSK, &CE, &UK, &UTC, &usET, &usCT, &usMT, &usAZ, &usPT};
+Timezone * timezones[] = {&ausET, &MSK, &CE, &UK, &UTC, &usET, &usCT, &usMT, &usAZ, &usPT, &TRT};
 
 void ICACHE_FLASH_ATTR NtpClient::Ntp(const char * server, time_t syncMins, uint8_t tz_index) {
     TimeServerName = strdup(server);
     syncInterval   = syncMins * 60; // convert to seconds
 
     // check for out of bounds
-    if (tz_index > NTP_TIMEZONE_MAX) {
+    if (tz_index >= NTP_TIMEZONE_MAX) {
         tz_index = NTP_TIMEZONE_DEFAULT;
     }
     tz = timezones[tz_index]; // set timezone
diff --git a/src/Ntp.h b/src/Ntp.h
index 03bb88946..92f5cf680 100644
--- a/src/Ntp.h
+++ b/src/Ntp.h
@@ -13,10 +13,10 @@
 #include "TimeLib.h" // customized version of the Time library
 #include "Timezone.h"
 
-#define NTP_PACKET_SIZE 48 // NTP time is in the first 48 bytes of message
+#define NTP_PACKET_SIZE 48 // NTP time is in the first 48 bytes of the message
 #define NTP_INTERVAL_DEFAULT 60 // every hour
 #define NTP_TIMEZONE_DEFAULT 2 // CE
-#define NTP_TIMEZONE_MAX 9
+#define NTP_TIMEZONE_MAX 11
 
 class NtpClient {
   public:
diff --git a/src/websrc/myesp.htm b/src/websrc/myesp.htm
index 963e79ce6..32d5a397d 100644
--- a/src/websrc/myesp.htm
+++ b/src/websrc/myesp.htm
@@ -408,6 +408,7 @@
                 <option value="7">US Mountain (Denver, Salt Lake City)</option>
                 <option value="8">Arizona (no DST)</option>
                 <option value="9">US Pacific (Las Vegas, Los Angeles)</option>
+                <option value="10">Turkey</option>
             </select>
         </span>
     </div>