From ae295f1bf5fc9564533747e04ee22c624f905308 Mon Sep 17 00:00:00 2001
From: puddly <32534428+puddly@users.noreply.github.com>
Date: Thu, 7 Jul 2022 04:49:32 -0400
Subject: [PATCH] Add three decimal places of sub-second resolution to root
 logger timestamps (#74518)

---
 homeassistant/bootstrap.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/homeassistant/bootstrap.py b/homeassistant/bootstrap.py
index 81d0fa72134..939d3073f57 100644
--- a/homeassistant/bootstrap.py
+++ b/homeassistant/bootstrap.py
@@ -285,7 +285,9 @@ def async_enable_logging(
 
     This method must be run in the event loop.
     """
-    fmt = "%(asctime)s %(levelname)s (%(threadName)s) [%(name)s] %(message)s"
+    fmt = (
+        "%(asctime)s.%(msecs)03d %(levelname)s (%(threadName)s) [%(name)s] %(message)s"
+    )
     datefmt = "%Y-%m-%d %H:%M:%S"
 
     if not log_no_color: