diff --git a/esphome/core/time.cpp b/esphome/core/time.cpp
index 66a0e1c0a7..672f5b98bf 100644
--- a/esphome/core/time.cpp
+++ b/esphome/core/time.cpp
@@ -197,6 +197,7 @@ void ESPTime::recalc_timestamp_local() {
   tm.tm_hour = this->hour;
   tm.tm_min = this->minute;
   tm.tm_sec = this->second;
+  tm.tm_isdst = -1;
 
   this->timestamp = mktime(&tm);
 }