diff --git a/homeassistant/components/bluetooth/__init__.py b/homeassistant/components/bluetooth/__init__.py
index 8d3bc0ae5e2..bf4dbf81f01 100644
--- a/homeassistant/components/bluetooth/__init__.py
+++ b/homeassistant/components/bluetooth/__init__.py
@@ -76,7 +76,7 @@ from .models import (
     BluetoothScanningMode,
     HaBluetoothConnector,
 )
-from .scanner import HaScanner, ScannerStartError
+from .scanner import MONOTONIC_TIME, HaScanner, ScannerStartError
 from .storage import BluetoothStorage
 
 if TYPE_CHECKING:
@@ -108,6 +108,7 @@ __all__ = [
     "HaBluetoothConnector",
     "SOURCE_LOCAL",
     "FALLBACK_MAXIMUM_STALE_ADVERTISEMENT_SECONDS",
+    "MONOTONIC_TIME",
 ]
 
 _LOGGER = logging.getLogger(__name__)
diff --git a/homeassistant/components/bluetooth/base_scanner.py b/homeassistant/components/bluetooth/base_scanner.py
index 8f7750fe322..e8de285138e 100644
--- a/homeassistant/components/bluetooth/base_scanner.py
+++ b/homeassistant/components/bluetooth/base_scanner.py
@@ -299,10 +299,10 @@ class BaseHaRemoteScanner(BaseHaScanner):
         manufacturer_data: dict[int, bytes],
         tx_power: int | None,
         details: dict[Any, Any],
+        advertisement_monotonic_time: float,
     ) -> None:
         """Call the registered callback."""
-        now = MONOTONIC_TIME()
-        self._last_detection = now
+        self._last_detection = advertisement_monotonic_time
         if prev_discovery := self._discovered_device_advertisement_datas.get(address):
             # Merge the new data with the old data
             # to function the same as BlueZ which
@@ -365,7 +365,7 @@ class BaseHaRemoteScanner(BaseHaScanner):
             device,
             advertisement_data,
         )
-        self._discovered_device_timestamps[address] = now
+        self._discovered_device_timestamps[address] = advertisement_monotonic_time
         self._new_info_callback(
             BluetoothServiceInfoBleak(
                 name=local_name or address,
@@ -378,7 +378,7 @@ class BaseHaRemoteScanner(BaseHaScanner):
                 device=device,
                 advertisement=advertisement_data,
                 connectable=self.connectable,
-                time=now,
+                time=advertisement_monotonic_time,
             )
         )
 
diff --git a/homeassistant/components/esphome/bluetooth/scanner.py b/homeassistant/components/esphome/bluetooth/scanner.py
index 85ab991df4e..5013a288dcf 100644
--- a/homeassistant/components/esphome/bluetooth/scanner.py
+++ b/homeassistant/components/esphome/bluetooth/scanner.py
@@ -4,7 +4,7 @@ from __future__ import annotations
 from aioesphomeapi import BluetoothLEAdvertisement, BluetoothLERawAdvertisement
 from bluetooth_data_tools import int_to_bluetooth_address, parse_advertisement_data
 
-from homeassistant.components.bluetooth import BaseHaRemoteScanner
+from homeassistant.components.bluetooth import MONOTONIC_TIME, BaseHaRemoteScanner
 from homeassistant.core import callback
 
 
@@ -24,6 +24,7 @@ class ESPHomeScanner(BaseHaRemoteScanner):
             adv.manufacturer_data,
             None,
             {"address_type": adv.address_type},
+            MONOTONIC_TIME(),
         )
 
     @callback
@@ -31,6 +32,7 @@ class ESPHomeScanner(BaseHaRemoteScanner):
         self, advertisements: list[BluetoothLERawAdvertisement]
     ) -> None:
         """Call the registered callback."""
+        now = MONOTONIC_TIME()
         for adv in advertisements:
             parsed = parse_advertisement_data((adv.data,))
             self._async_on_advertisement(
@@ -42,4 +44,5 @@ class ESPHomeScanner(BaseHaRemoteScanner):
                 parsed.manufacturer_data,
                 None,
                 {"address_type": adv.address_type},
+                now,
             )
diff --git a/homeassistant/components/ruuvi_gateway/bluetooth.py b/homeassistant/components/ruuvi_gateway/bluetooth.py
index 4dd973155a9..47a9bbfdde0 100644
--- a/homeassistant/components/ruuvi_gateway/bluetooth.py
+++ b/homeassistant/components/ruuvi_gateway/bluetooth.py
@@ -9,6 +9,7 @@ from home_assistant_bluetooth import BluetoothServiceInfoBleak
 
 from homeassistant.components.bluetooth import (
     FALLBACK_MAXIMUM_STALE_ADVERTISEMENT_SECONDS,
+    MONOTONIC_TIME,
     BaseHaRemoteScanner,
     async_get_advertisement_callback,
     async_register_scanner,
@@ -47,6 +48,7 @@ class RuuviGatewayScanner(BaseHaRemoteScanner):
     @callback
     def _async_handle_new_data(self) -> None:
         now = time.time()
+        monotonic_now = MONOTONIC_TIME()
         for tag_data in self.coordinator.data:
             data_age_seconds = now - tag_data.timestamp  # Both are Unix time
             if data_age_seconds > FALLBACK_MAXIMUM_STALE_ADVERTISEMENT_SECONDS:
@@ -62,6 +64,7 @@ class RuuviGatewayScanner(BaseHaRemoteScanner):
                 manufacturer_data=anno.manufacturer_data,
                 tx_power=anno.tx_power,
                 details={},
+                advertisement_monotonic_time=monotonic_now - data_age_seconds,
             )
 
     @callback
diff --git a/homeassistant/components/shelly/bluetooth/scanner.py b/homeassistant/components/shelly/bluetooth/scanner.py
index 5b302e0da62..7c0dc3c792a 100644
--- a/homeassistant/components/shelly/bluetooth/scanner.py
+++ b/homeassistant/components/shelly/bluetooth/scanner.py
@@ -6,7 +6,7 @@ from typing import Any
 from aioshelly.ble import parse_ble_scan_result_event
 from aioshelly.ble.const import BLE_SCAN_RESULT_EVENT, BLE_SCAN_RESULT_VERSION
 
-from homeassistant.components.bluetooth import BaseHaRemoteScanner
+from homeassistant.components.bluetooth import MONOTONIC_TIME, BaseHaRemoteScanner
 from homeassistant.core import callback
 
 from ..const import LOGGER
@@ -44,4 +44,5 @@ class ShellyBLEScanner(BaseHaRemoteScanner):
             parsed.manufacturer_data,
             parsed.tx_power,
             {},
+            MONOTONIC_TIME(),
         )
diff --git a/tests/components/bluetooth/test_api.py b/tests/components/bluetooth/test_api.py
index 77d802264e1..63b60c8f487 100644
--- a/tests/components/bluetooth/test_api.py
+++ b/tests/components/bluetooth/test_api.py
@@ -1,8 +1,12 @@
 """Tests for the Bluetooth integration API."""
+import time
+
 from bleak.backends.scanner import AdvertisementData, BLEDevice
+import pytest
 
 from homeassistant.components import bluetooth
 from homeassistant.components.bluetooth import (
+    MONOTONIC_TIME,
     BaseHaRemoteScanner,
     BaseHaScanner,
     HaBluetoothConnector,
@@ -31,6 +35,11 @@ async def test_scanner_by_source(hass: HomeAssistant, enable_bluetooth: None) ->
     assert async_scanner_by_source(hass, "hci2") is None
 
 
+async def test_monotonic_time() -> None:
+    """Test monotonic time."""
+    assert MONOTONIC_TIME() == pytest.approx(time.monotonic(), abs=0.1)
+
+
 async def test_async_scanner_devices_by_address_connectable(
     hass: HomeAssistant, enable_bluetooth: None
 ) -> None:
@@ -51,6 +60,7 @@ async def test_async_scanner_devices_by_address_connectable(
                 advertisement_data.manufacturer_data,
                 advertisement_data.tx_power,
                 {"scanner_specific_data": "test"},
+                MONOTONIC_TIME(),
             )
 
     new_info_callback = manager.scanner_adv_received
diff --git a/tests/components/bluetooth/test_base_scanner.py b/tests/components/bluetooth/test_base_scanner.py
index 8817acad468..5662bc6324b 100644
--- a/tests/components/bluetooth/test_base_scanner.py
+++ b/tests/components/bluetooth/test_base_scanner.py
@@ -12,6 +12,7 @@ import pytest
 
 from homeassistant.components import bluetooth
 from homeassistant.components.bluetooth import (
+    MONOTONIC_TIME,
     BaseHaRemoteScanner,
     HaBluetoothConnector,
     storage,
@@ -84,6 +85,7 @@ async def test_remote_scanner(hass: HomeAssistant, enable_bluetooth: None) -> No
                 advertisement_data.manufacturer_data,
                 advertisement_data.tx_power,
                 {"scanner_specific_data": "test"},
+                MONOTONIC_TIME(),
             )
 
     new_info_callback = manager.scanner_adv_received
@@ -158,6 +160,7 @@ async def test_remote_scanner_expires_connectable(
                 advertisement_data.manufacturer_data,
                 advertisement_data.tx_power,
                 {"scanner_specific_data": "test"},
+                MONOTONIC_TIME(),
             )
 
     new_info_callback = manager.scanner_adv_received
@@ -232,6 +235,7 @@ async def test_remote_scanner_expires_non_connectable(
                 advertisement_data.manufacturer_data,
                 advertisement_data.tx_power,
                 {"scanner_specific_data": "test"},
+                MONOTONIC_TIME(),
             )
 
     new_info_callback = manager.scanner_adv_received
@@ -329,6 +333,7 @@ async def test_base_scanner_connecting_behavior(
                 advertisement_data.manufacturer_data,
                 advertisement_data.tx_power,
                 {"scanner_specific_data": "test"},
+                MONOTONIC_TIME(),
             )
 
     new_info_callback = manager.scanner_adv_received
@@ -452,6 +457,7 @@ async def test_device_with_ten_minute_advertising_interval(
                 advertisement_data.manufacturer_data,
                 advertisement_data.tx_power,
                 {"scanner_specific_data": "test"},
+                MONOTONIC_TIME(),
             )
 
     new_info_callback = manager.scanner_adv_received
diff --git a/tests/components/bluetooth/test_diagnostics.py b/tests/components/bluetooth/test_diagnostics.py
index 7ffd3f00131..765e2a9a612 100644
--- a/tests/components/bluetooth/test_diagnostics.py
+++ b/tests/components/bluetooth/test_diagnostics.py
@@ -5,7 +5,11 @@ from bleak.backends.scanner import AdvertisementData, BLEDevice
 from bluetooth_adapters import DEFAULT_ADDRESS
 
 from homeassistant.components import bluetooth
-from homeassistant.components.bluetooth import BaseHaRemoteScanner, HaBluetoothConnector
+from homeassistant.components.bluetooth import (
+    MONOTONIC_TIME,
+    BaseHaRemoteScanner,
+    HaBluetoothConnector,
+)
 from homeassistant.core import HomeAssistant
 
 from . import (
@@ -450,6 +454,7 @@ async def test_diagnostics_remote_adapter(
                 advertisement_data.manufacturer_data,
                 advertisement_data.tx_power,
                 {"scanner_specific_data": "test"},
+                MONOTONIC_TIME(),
             )
 
     with patch(
diff --git a/tests/components/bluetooth/test_manager.py b/tests/components/bluetooth/test_manager.py
index 85da27b027e..67b0b594249 100644
--- a/tests/components/bluetooth/test_manager.py
+++ b/tests/components/bluetooth/test_manager.py
@@ -11,6 +11,7 @@ import pytest
 
 from homeassistant.components import bluetooth
 from homeassistant.components.bluetooth import (
+    MONOTONIC_TIME,
     BaseHaRemoteScanner,
     BluetoothChange,
     BluetoothScanningMode,
@@ -711,6 +712,7 @@ async def test_goes_unavailable_connectable_only_and_recovers(
                 advertisement_data.manufacturer_data,
                 advertisement_data.tx_power,
                 {"scanner_specific_data": "test"},
+                MONOTONIC_TIME(),
             )
 
     new_info_callback = async_get_advertisement_callback(hass)
@@ -883,6 +885,7 @@ async def test_goes_unavailable_dismisses_discovery_and_makes_discoverable(
                 advertisement_data.manufacturer_data,
                 advertisement_data.tx_power,
                 {"scanner_specific_data": "test"},
+                MONOTONIC_TIME(),
             )
 
         def clear_all_devices(self) -> None:
diff --git a/tests/components/bluetooth/test_wrappers.py b/tests/components/bluetooth/test_wrappers.py
index e1656b39c18..de646f8ef9c 100644
--- a/tests/components/bluetooth/test_wrappers.py
+++ b/tests/components/bluetooth/test_wrappers.py
@@ -10,6 +10,7 @@ from bleak.backends.scanner import AdvertisementData
 import pytest
 
 from homeassistant.components.bluetooth import (
+    MONOTONIC_TIME,
     BaseHaRemoteScanner,
     BluetoothServiceInfoBleak,
     HaBluetoothConnector,
@@ -59,6 +60,7 @@ class FakeScanner(BaseHaRemoteScanner):
             advertisement_data.manufacturer_data,
             advertisement_data.tx_power,
             device.details | {"scanner_specific_data": "test"},
+            MONOTONIC_TIME(),
         )