diff --git a/esphome/components/time/posix_tz.cpp b/esphome/components/time/posix_tz.cpp
index 1de3504072..9584db568d 100644
--- a/esphome/components/time/posix_tz.cpp
+++ b/esphome/components/time/posix_tz.cpp
@@ -3,7 +3,7 @@
 
 namespace esphome::time {
 
-// Global timezone for ESPTime::from_epoch_local() to use
+// Global timezone - set once at startup, rarely changes
 static ParsedTimezone global_tz_{};
 
 void set_global_tz(const ParsedTimezone &tz) { global_tz_ = tz; }