diff --git a/AsuroTool/AsuroTool.cpp b/AsuroTool/AsuroTool.cpp
index f5a44ef..968136c 100644
--- a/AsuroTool/AsuroTool.cpp
+++ b/AsuroTool/AsuroTool.cpp
@@ -163,9 +163,7 @@ void draw(DrawData& drawData, ApplicationData& appData)
 	if (appData.hoverTargetType == HoverTargetType::HOVER_TARGET_CHECKLIST_DAY)
 	{
 		ImGui::BeginTooltip();
-		char timeStr[32];
-		snprintf(timeStr, _countof(timeStr), "%02u.%02u", unsigned int{ appData.hoverTargetDay.day() }, unsigned int{ appData.hoverTargetDay.month() });
-		ImGui::Text(timeStr);
+		ImGui::Text(std::format("{:%a, %d.%m}", std::chrono::sys_days{ appData.hoverTargetDay }).c_str());
 		ImGui::EndTooltip();
 	}
 }