From 7e037e1a30109786b8e6b1689da7b39ff2753757 Mon Sep 17 00:00:00 2001
From: teknium1 <127238744+teknium1@users.noreply.github.com>
Date: Sat, 4 Jul 2026 14:12:37 -0700
Subject: [PATCH] fix: cover remaining GNU-only %-d strftime site in learning
 graph render

format_date() at line 76 still used %-d, which raises ValueError on
Windows strftime. Same class as the axis-label site fixed by #56640;
use dt.day directly. Credit also to @x7peeps (#58480) who flagged both
sites.
---
 agent/learning_graph_render.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/agent/learning_graph_render.py b/agent/learning_graph_render.py
index c367cbf7bbb..3602ee270e6 100644
--- a/agent/learning_graph_render.py
+++ b/agent/learning_graph_render.py
@@ -73,7 +73,8 @@ def format_date(ts: Optional[float]) -> str:
     if not ts:
         return "unknown"
     try:
-        return datetime.fromtimestamp(float(ts), tz=timezone.utc).strftime("%-d %b %Y")
+        dt = datetime.fromtimestamp(float(ts), tz=timezone.utc)
+        return f"{dt.day} {dt.strftime('%b %Y')}"
     except (ValueError, OSError, OverflowError):
         return "unknown"