From 8861abea732642a1a625141a40ee3545237f1fd9 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Thu, 15 Jan 2026 13:14:22 -1000
Subject: [PATCH] avoid clock churn

---
 esphome/components/time/real_time_clock.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/esphome/components/time/real_time_clock.cpp b/esphome/components/time/real_time_clock.cpp
index 639af4457f9..fce09d14778 100644
--- a/esphome/components/time/real_time_clock.cpp
+++ b/esphome/components/time/real_time_clock.cpp
@@ -31,6 +31,14 @@ void RealTimeClock::dump_config() {
 
 void RealTimeClock::synchronize_epoch_(uint32_t epoch) {
   ESP_LOGVV(TAG, "Got epoch %" PRIu32, epoch);
+  // Skip if time is already synchronized to avoid unnecessary writes and log spam
+  auto current = this->utcnow();
+  if (current.is_valid()) {
+    int32_t diff = static_cast<int32_t>(epoch) - static_cast<int32_t>(current.timestamp);
+    if (diff >= -1 && diff <= 1) {
+      return;
+    }
+  }
   // Update UTC epoch time.
 #ifdef USE_ZEPHYR
   struct timespec ts;