diff --git a/lib/framework/NTPSettingsService.cpp b/lib/framework/NTPSettingsService.cpp
index e00a84c2b..efd5132ee 100644
--- a/lib/framework/NTPSettingsService.cpp
+++ b/lib/framework/NTPSettingsService.cpp
@@ -62,6 +62,7 @@ void NTPSettingsService::configureTime(AsyncWebServerRequest * request, JsonVari
         String    timeLocal = json["local_time"];
         char *    s         = strptime(timeLocal.c_str(), "%Y-%m-%dT%H:%M:%S", &tm);
         if (s != nullptr) {
+            tm.tm_isdst         = -1; // not set by strptime, tells mktime to determine daylightsaving
             time_t         time = mktime(&tm);
             struct timeval now  = {.tv_sec = time};
             settimeofday(&now, nullptr);