diff --git a/esphome/core/time.cpp b/esphome/core/time.cpp
index 053cf55772..f229340083 100644
--- a/esphome/core/time.cpp
+++ b/esphome/core/time.cpp
@@ -281,13 +281,8 @@ int32_t ESPTime::timezone_offset() {
   }
   return -tz.std_offset_seconds;
 #else
-  time_t now = ::time(nullptr);
-  struct tm local_tm = *::localtime(&now);
-  local_tm.tm_isdst = 0;  // Cause mktime to ignore daylight saving time because we want to include it in the offset.
-  time_t local_time = mktime(&local_tm);
-  struct tm utc_tm = *::gmtime(&now);
-  time_t utc_time = mktime(&utc_tm);
-  return static_cast<int32_t>(local_time - utc_time);
+  // No timezone support - no offset
+  return 0;
 #endif
 }
 
diff --git a/esphome/core/time.h b/esphome/core/time.h
index 718477563a..3df4d02cad 100644
--- a/esphome/core/time.h
+++ b/esphome/core/time.h
@@ -117,11 +117,8 @@ struct ESPTime {
     // Fallback to UTC if conversion failed
     return ESPTime::from_epoch_utc(epoch);
 #else
-    struct tm *c_tm = ::localtime(&epoch);
-    if (c_tm == nullptr) {
-      return ESPTime{};  // Return an invalid ESPTime
-    }
-    return ESPTime::from_c_tm(c_tm, epoch);
+    // No timezone support - return UTC (no TZ configured, localtime would return UTC anyway)
+    return ESPTime::from_epoch_utc(epoch);
 #endif
   }
   /** Convert an UTC epoch timestamp to a UTC time ESPTime instance.