diff --git a/esphome/components/esp32/core.cpp b/esphome/components/esp32/core.cpp
index 202d929ab9..b9ae871abf 100644
--- a/esphome/components/esp32/core.cpp
+++ b/esphome/components/esp32/core.cpp
@@ -23,6 +23,7 @@ namespace esphome {
 
 void HOT yield() { vPortYield(); }
 uint32_t IRAM_ATTR HOT millis() { return (uint32_t) (esp_timer_get_time() / 1000ULL); }
+uint64_t HOT millis_64() { return static_cast<uint64_t>(esp_timer_get_time()) / 1000ULL; }
 void HOT delay(uint32_t ms) { vTaskDelay(ms / portTICK_PERIOD_MS); }
 uint32_t IRAM_ATTR HOT micros() { return (uint32_t) esp_timer_get_time(); }
 void IRAM_ATTR HOT delayMicroseconds(uint32_t us) { delay_microseconds_safe(us); }
diff --git a/esphome/components/esp8266/core.cpp b/esphome/components/esp8266/core.cpp
index 236d3022be..497e99b61f 100644
--- a/esphome/components/esp8266/core.cpp
+++ b/esphome/components/esp8266/core.cpp
@@ -3,6 +3,7 @@
 #include "core.h"
 #include "esphome/core/defines.h"
 #include "esphome/core/hal.h"
+#include "esphome/core/application.h"
 #include "esphome/core/helpers.h"
 #include "preferences.h"
 #include <Arduino.h>
@@ -16,6 +17,7 @@ namespace esphome {
 
 void HOT yield() { ::yield(); }
 uint32_t IRAM_ATTR HOT millis() { return ::millis(); }
+uint64_t millis_64() { return App.scheduler.millis_64_impl_(::millis()); }
 void HOT delay(uint32_t ms) { ::delay(ms); }
 uint32_t IRAM_ATTR HOT micros() { return ::micros(); }
 void IRAM_ATTR HOT delayMicroseconds(uint32_t us) { delay_microseconds_safe(us); }
diff --git a/esphome/components/host/core.cpp b/esphome/components/host/core.cpp
index c20a33fa37..5c08717ac9 100644
--- a/esphome/components/host/core.cpp
+++ b/esphome/components/host/core.cpp
@@ -1,5 +1,6 @@
 #ifdef USE_HOST
 
+#include "esphome/core/application.h"
 #include "esphome/core/hal.h"
 #include "esphome/core/helpers.h"
 #include "preferences.h"
@@ -19,6 +20,7 @@ uint32_t IRAM_ATTR HOT millis() {
   uint32_t ms = round(spec.tv_nsec / 1e6);
   return ((uint32_t) seconds) * 1000U + ms;
 }
+uint64_t millis_64() { return App.scheduler.millis_64_impl_(millis()); }
 void HOT delay(uint32_t ms) {
   struct timespec ts;
   ts.tv_sec = ms / 1000;
diff --git a/esphome/components/libretiny/core.cpp b/esphome/components/libretiny/core.cpp
index 4dda7c3856..6cbc81938d 100644
--- a/esphome/components/libretiny/core.cpp
+++ b/esphome/components/libretiny/core.cpp
@@ -3,6 +3,7 @@
 #include "core.h"
 #include "esphome/core/defines.h"
 #include "esphome/core/hal.h"
+#include "esphome/core/application.h"
 #include "esphome/core/helpers.h"
 #include "preferences.h"
 
@@ -13,6 +14,7 @@ namespace esphome {
 
 void HOT yield() { ::yield(); }
 uint32_t IRAM_ATTR HOT millis() { return ::millis(); }
+uint64_t millis_64() { return App.scheduler.millis_64_impl_(::millis()); }
 uint32_t IRAM_ATTR HOT micros() { return ::micros(); }
 void HOT delay(uint32_t ms) { ::delay(ms); }
 void IRAM_ATTR HOT delayMicroseconds(uint32_t us) { ::delayMicroseconds(us); }
diff --git a/esphome/components/rp2040/core.cpp b/esphome/components/rp2040/core.cpp
index 37378d88bb..52c6f1185c 100644
--- a/esphome/components/rp2040/core.cpp
+++ b/esphome/components/rp2040/core.cpp
@@ -3,6 +3,7 @@
 #include "core.h"
 #include "esphome/core/defines.h"
 #include "esphome/core/hal.h"
+#include "esphome/core/application.h"
 #include "esphome/core/helpers.h"
 
 #include "hardware/watchdog.h"
@@ -11,6 +12,7 @@ namespace esphome {
 
 void HOT yield() { ::yield(); }
 uint32_t IRAM_ATTR HOT millis() { return ::millis(); }
+uint64_t millis_64() { return App.scheduler.millis_64_impl_(::millis()); }
 void HOT delay(uint32_t ms) { ::delay(ms); }
 uint32_t IRAM_ATTR HOT micros() { return ::micros(); }
 void IRAM_ATTR HOT delayMicroseconds(uint32_t us) { delay_microseconds_safe(us); }
diff --git a/esphome/components/uptime/sensor/uptime_seconds_sensor.cpp b/esphome/components/uptime/sensor/uptime_seconds_sensor.cpp
index 20e8ed8fda..552e4e5da4 100644
--- a/esphome/components/uptime/sensor/uptime_seconds_sensor.cpp
+++ b/esphome/components/uptime/sensor/uptime_seconds_sensor.cpp
@@ -1,6 +1,6 @@
 #include "uptime_seconds_sensor.h"
 
-#include "esphome/core/application.h"
+#include "esphome/core/hal.h"
 #include "esphome/core/log.h"
 
 namespace esphome::uptime {
@@ -8,7 +8,7 @@ namespace esphome::uptime {
 static const char *const TAG = "uptime.sensor";
 
 void UptimeSecondsSensor::update() {
-  const uint64_t uptime = App.scheduler.millis_64();
+  const uint64_t uptime = millis_64();
   const uint64_t seconds_int = uptime / 1000ULL;
   const float seconds = float(seconds_int) + (uptime % 1000ULL) / 1000.0f;
   this->publish_state(seconds);
diff --git a/esphome/components/uptime/text_sensor/uptime_text_sensor.cpp b/esphome/components/uptime/text_sensor/uptime_text_sensor.cpp
index 88ae53fbfc..c89d23672e 100644
--- a/esphome/components/uptime/text_sensor/uptime_text_sensor.cpp
+++ b/esphome/components/uptime/text_sensor/uptime_text_sensor.cpp
@@ -1,6 +1,6 @@
 #include "uptime_text_sensor.h"
 
-#include "esphome/core/application.h"
+#include "esphome/core/hal.h"
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
 
@@ -19,7 +19,7 @@ static void append_unit(char *buf, size_t buf_size, size_t &pos, const char *sep
 void UptimeTextSensor::setup() { this->update(); }
 
 void UptimeTextSensor::update() {
-  uint32_t uptime = static_cast<uint32_t>(App.scheduler.millis_64() / 1000);
+  uint32_t uptime = static_cast<uint32_t>(millis_64() / 1000);
   unsigned interval = this->get_update_interval() / 1000;
 
   // Calculate all time units
diff --git a/esphome/components/web_server/web_server.cpp b/esphome/components/web_server/web_server.cpp
index e2f9c21331..16674321c9 100644
--- a/esphome/components/web_server/web_server.cpp
+++ b/esphome/components/web_server/web_server.cpp
@@ -385,7 +385,7 @@ json::SerializationBuffer<> WebServer::get_config_json() {
 #endif
   root[ESPHOME_F("log")] = this->expose_log_;
   root[ESPHOME_F("lang")] = "en";
-  root[ESPHOME_F("uptime")] = static_cast<uint32_t>(App.scheduler.millis_64() / 1000);
+  root[ESPHOME_F("uptime")] = static_cast<uint32_t>(millis_64() / 1000);
 
   return builder.serialize();
 }
@@ -414,7 +414,7 @@ void WebServer::setup() {
   // getting a lot of events
   this->set_interval(10000, [this]() {
     char buf[32];
-    auto uptime = static_cast<uint32_t>(App.scheduler.millis_64() / 1000);
+    auto uptime = static_cast<uint32_t>(millis_64() / 1000);
     buf_append_printf(buf, sizeof(buf), 0, "{\"uptime\":%u}", uptime);
     this->events_.try_send_nodefer(buf, "ping", millis(), 30000);
   });
diff --git a/esphome/components/zephyr/core.cpp b/esphome/components/zephyr/core.cpp
index d7027b33f5..7f5d6d44fa 100644
--- a/esphome/components/zephyr/core.cpp
+++ b/esphome/components/zephyr/core.cpp
@@ -4,6 +4,7 @@
 #include <zephyr/drivers/watchdog.h>
 #include <zephyr/sys/reboot.h>
 #include <zephyr/random/random.h>
+#include "esphome/core/application.h"
 #include "esphome/core/hal.h"
 #include "esphome/core/helpers.h"
 #include "esphome/core/defines.h"
@@ -17,6 +18,7 @@ static const device *const WDT = DEVICE_DT_GET(DT_ALIAS(watchdog0));
 
 void yield() { ::k_yield(); }
 uint32_t millis() { return k_ticks_to_ms_floor32(k_uptime_ticks()); }
+uint64_t millis_64() { return App.scheduler.millis_64_impl_(millis()); }
 uint32_t micros() { return k_ticks_to_us_floor32(k_uptime_ticks()); }
 void delayMicroseconds(uint32_t us) { ::k_usleep(us); }
 void delay(uint32_t ms) { ::k_msleep(ms); }
diff --git a/esphome/core/hal.h b/esphome/core/hal.h
index 1a4230e421..fa5ca646f2 100644
--- a/esphome/core/hal.h
+++ b/esphome/core/hal.h
@@ -32,6 +32,7 @@ namespace esphome {
 
 void yield();
 uint32_t millis();
+uint64_t millis_64();
 uint32_t micros();
 void delay(uint32_t ms);
 void delayMicroseconds(uint32_t us);  // NOLINT(readability-identifier-naming)
diff --git a/esphome/core/scheduler.cpp b/esphome/core/scheduler.cpp
index d9c66b2000..06c0bb8b1b 100644
--- a/esphome/core/scheduler.cpp
+++ b/esphome/core/scheduler.cpp
@@ -28,8 +28,10 @@ static constexpr size_t MAX_POOL_SIZE = 5;
 // Set to 5 to match the pool size - when we have as many cancelled items as our
 // pool can hold, it's time to clean up and recycle them.
 static constexpr uint32_t MAX_LOGICALLY_DELETED_ITEMS = 5;
+#ifndef USE_ESP32
 // Half the 32-bit range - used to detect rollovers vs normal time progression
 static constexpr uint32_t HALF_MAX_UINT32 = std::numeric_limits<uint32_t>::max() / 2;
+#endif
 // max delay to start an interval sequence
 static constexpr uint32_t MAX_INTERVAL_DELAY = 5000;
 
@@ -150,8 +152,8 @@ void HOT Scheduler::set_timer_common_(Component *component, SchedulerItem::Type
     return;
   }
 
-  // Get fresh timestamp BEFORE taking lock - millis_64_ may need to acquire lock itself
-  const uint64_t now = this->millis_64_(millis());
+  // Get fresh 64-bit timestamp BEFORE taking lock
+  const uint64_t now_64 = millis_64();
 
   // Take lock early to protect scheduler_item_pool_ access
   LockGuard guard{this->lock_};
@@ -184,7 +186,7 @@ void HOT Scheduler::set_timer_common_(Component *component, SchedulerItem::Type
       item->interval = delay;
       // first execution happens immediately after a random smallish offset
       uint32_t offset = this->calculate_interval_offset_(delay);
-      item->set_next_execution(now + offset);
+      item->set_next_execution(now_64 + offset);
 #ifdef ESPHOME_LOG_HAS_VERBOSE
       SchedulerNameLog name_log;
       ESP_LOGV(TAG, "Scheduler interval for %s is %" PRIu32 "ms, offset %" PRIu32 "ms",
@@ -192,11 +194,11 @@ void HOT Scheduler::set_timer_common_(Component *component, SchedulerItem::Type
 #endif
     } else {
       item->interval = 0;
-      item->set_next_execution(now + delay);
+      item->set_next_execution(now_64 + delay);
     }
 
 #ifdef ESPHOME_DEBUG_SCHEDULER
-    this->debug_log_timer_(item.get(), name_type, static_name, hash_or_id, type, delay, now);
+    this->debug_log_timer_(item.get(), name_type, static_name, hash_or_id, type, delay, now_64);
 #endif /* ESPHOME_DEBUG_SCHEDULER */
 
     // For retries, check if there's a cancelled timeout first
@@ -399,8 +401,7 @@ optional<uint32_t> HOT Scheduler::next_schedule_in(uint32_t now) {
     return {};
 
   auto &item = this->items_[0];
-  // Convert the fresh timestamp from caller (usually Application::loop()) to 64-bit
-  const auto now_64 = this->millis_64_(now);  // 'now' from parameter - fresh from caller
+  const auto now_64 = this->millis_64_from_(now);
   const uint64_t next_exec = item->get_next_execution();
   if (next_exec < now_64)
     return 0;
@@ -461,8 +462,8 @@ void HOT Scheduler::call(uint32_t now) {
   this->process_defer_queue_(now);
 #endif /* not ESPHOME_THREAD_SINGLE */
 
-  // Convert the fresh timestamp from main loop to 64-bit for scheduler operations
-  const auto now_64 = this->millis_64_(now);  // 'now' from parameter - fresh from Application::loop()
+  // Extend the caller's 32-bit timestamp to 64-bit for scheduler operations
+  const auto now_64 = this->millis_64_from_(now);
   this->process_to_add();
 
   // Track if any items were added to to_add_ during this call (intervals or from callbacks)
@@ -474,15 +475,18 @@ void HOT Scheduler::call(uint32_t now) {
   if (now_64 - last_print > 2000) {
     last_print = now_64;
     std::vector<SchedulerItemPtr> old_items;
-#ifdef ESPHOME_THREAD_MULTI_ATOMICS
+#if !defined(USE_ESP32) && defined(ESPHOME_THREAD_MULTI_ATOMICS)
     const auto last_dbg = this->last_millis_.load(std::memory_order_relaxed);
     const auto major_dbg = this->millis_major_.load(std::memory_order_relaxed);
     ESP_LOGD(TAG, "Items: count=%zu, pool=%zu, now=%" PRIu64 " (%" PRIu16 ", %" PRIu32 ")", this->items_.size(),
              this->scheduler_item_pool_.size(), now_64, major_dbg, last_dbg);
-#else  /* not ESPHOME_THREAD_MULTI_ATOMICS */
+#elif !defined(USE_ESP32)
     ESP_LOGD(TAG, "Items: count=%zu, pool=%zu, now=%" PRIu64 " (%" PRIu16 ", %" PRIu32 ")", this->items_.size(),
              this->scheduler_item_pool_.size(), now_64, this->millis_major_, this->last_millis_);
-#endif /* else ESPHOME_THREAD_MULTI_ATOMICS */
+#else
+    ESP_LOGD(TAG, "Items: count=%zu, pool=%zu, now=%" PRIu64, this->items_.size(), this->scheduler_item_pool_.size(),
+             now_64);
+#endif
     // Cleanup before debug output
     this->cleanup_();
     while (!this->items_.empty()) {
@@ -710,9 +714,8 @@ bool HOT Scheduler::cancel_item_locked_(Component *component, NameType name_type
   return total_cancelled > 0;
 }
 
-uint64_t Scheduler::millis_64() { return this->millis_64_(millis()); }
-
-uint64_t Scheduler::millis_64_(uint32_t now) {
+#ifndef USE_ESP32
+uint64_t Scheduler::millis_64_impl_(uint32_t now) {
   // THREAD SAFETY NOTE:
   // This function has three implementations, based on the precompiler flags
   // - ESPHOME_THREAD_SINGLE - Runs on single-threaded platforms (ESP8266, RP2040, etc.)
@@ -869,6 +872,7 @@ uint64_t Scheduler::millis_64_(uint32_t now) {
     "No platform threading model defined. One of ESPHOME_THREAD_SINGLE, ESPHOME_THREAD_MULTI_NO_ATOMICS, or ESPHOME_THREAD_MULTI_ATOMICS must be defined."
 #endif
 }
+#endif  // not USE_ESP32
 
 bool HOT Scheduler::SchedulerItem::cmp(const SchedulerItemPtr &a, const SchedulerItemPtr &b) {
   // High bits are almost always equal (change only on 32-bit rollover ~49 days)
diff --git a/esphome/core/scheduler.h b/esphome/core/scheduler.h
index 840ee7159a..c605325810 100644
--- a/esphome/core/scheduler.h
+++ b/esphome/core/scheduler.h
@@ -10,6 +10,7 @@
 #endif
 
 #include "esphome/core/component.h"
+#include "esphome/core/hal.h"
 #include "esphome/core/helpers.h"
 
 namespace esphome {
@@ -117,12 +118,12 @@ class Scheduler {
   bool cancel_retry(Component *component, uint32_t id);
 
   /// Get 64-bit millisecond timestamp (handles 32-bit millis() rollover)
-  uint64_t millis_64();
+  uint64_t millis_64() { return esphome::millis_64(); }
 
-  // Calculate when the next scheduled item should run
-  // @param now Fresh timestamp from millis() - must not be stale/cached
-  // Returns the time in milliseconds until the next scheduled item, or nullopt if no items
-  // This method performs cleanup of removed items before checking the schedule
+  // Calculate when the next scheduled item should run.
+  // @param now On ESP32, unused for 64-bit extension (native); on other platforms, extended to 64-bit via rollover.
+  // Returns the time in milliseconds until the next scheduled item, or nullopt if no items.
+  // This method performs cleanup of removed items before checking the schedule.
   // IMPORTANT: This method should only be called from the main thread (loop task).
   optional<uint32_t> next_schedule_in(uint32_t now);
 
@@ -282,7 +283,25 @@ class Scheduler {
   // Common implementation for cancel_retry
   bool cancel_retry_(Component *component, NameType name_type, const char *static_name, uint32_t hash_or_id);
 
-  uint64_t millis_64_(uint32_t now);
+  // Extend a 32-bit millis() value to 64-bit. Use when the caller already has a fresh now.
+  // On ESP32, ignores now and uses esp_timer_get_time() directly (native 64-bit).
+  // On non-ESP32, extends now to 64-bit using rollover tracking.
+  uint64_t millis_64_from_(uint32_t now) {
+#ifdef USE_ESP32
+    (void) now;
+    return millis_64();
+#else
+    return this->millis_64_impl_(now);
+#endif
+  }
+
+#ifndef USE_ESP32
+  // On non-ESP32 platforms, millis_64() HAL function delegates to this method
+  // which tracks 32-bit millis() rollover using millis_major_ and last_millis_.
+  // On ESP32, millis_64() uses esp_timer_get_time() directly.
+  friend uint64_t millis_64();
+  uint64_t millis_64_impl_(uint32_t now);
+#endif
   // Cleanup logically deleted items from the scheduler
   // Returns the number of items remaining after cleanup
   // IMPORTANT: This method should only be called from the main thread (loop task).
@@ -549,6 +568,9 @@ class Scheduler {
   //   to synchronize between tasks (see https://github.com/esphome/backlog/issues/52)
   std::vector<SchedulerItemPtr> scheduler_item_pool_;
 
+#ifndef USE_ESP32
+  // On ESP32, millis_64() uses esp_timer_get_time() directly; no rollover tracking needed.
+  // On other platforms, these fields track 32-bit millis() rollover for millis_64_impl_().
 #ifdef ESPHOME_THREAD_MULTI_ATOMICS
   /*
    * Multi-threaded platforms with atomic support: last_millis_ needs atomic for lock-free updates
@@ -577,6 +599,7 @@ class Scheduler {
 #else  /* not ESPHOME_THREAD_MULTI_ATOMICS */
   uint16_t millis_major_{0};
 #endif /* else ESPHOME_THREAD_MULTI_ATOMICS */
+#endif /* not USE_ESP32 */
 };
 
 }  // namespace esphome