diff --git a/internal/card/card_test.go b/internal/card/card_test.go
index dc770f93..baee9681 100644
--- a/internal/card/card_test.go
+++ b/internal/card/card_test.go
@@ -290,6 +290,8 @@ func adversarialProfile() *github.Profile {
 	p := &github.Profile{
 		Login:                      "user-with-a-very-long-login-name",
 		Name:                       "A Very Long Display Name That Keeps Going",
+		UTCOffsetLabel:             "UTC+12.75", // half-hour / quarter-hour zones widen the title
+
 		Company:                    "A-Company-With-An-Unusually-Long-Name Pty Ltd",
 		Location:                   "A Place With A Name That Is Way Too Long To Fit",
 		Website:                    "https://example-with-a-very-long-domain.example.com/profile",
diff --git a/internal/card/svg.go b/internal/card/svg.go
index ff0dbeee..dcd3ec63 100644
--- a/internal/card/svg.go
+++ b/internal/card/svg.go
@@ -3,6 +3,7 @@ package card
 import (
 	"fmt"
 	"strings"
+	"unicode/utf8"
 )
 
 // escapeXML replaces the five XML-significant characters so user-controlled
@@ -65,14 +66,43 @@ func formatInt(n int) string {
 	return out
 }
 
-// header returns the opening <svg> tag + background rect + title text.
+// header returns the opening <svg> tag + background rect + title text. The
+// title font-size is auto-shrunk if the string wouldn't fit on one line at
+// the default 15 px — productive-time and productive-weekday append the
+// timezone label ("UTC+7.00") which can push the title to ~40 chars, past
+// the 340 px frame at 15 px. Floor at 11 px so small zones stay readable.
 func header(width, height int, bg, stroke string, strokeOpacity float64, titleColor, title string) string {
+	fontSize := fitTitleFontSize(title, width)
 	return fmt.Sprintf(`<svg xmlns="http://www.w3.org/2000/svg" width="%d" height="%d" viewBox="0 0 %d %d" font-family="'Segoe UI', Ubuntu, Sans-Serif">
   <rect x="0.5" y="0.5" width="%d" height="%d" rx="6" fill="%s" stroke="%s" stroke-opacity="%.2f"/>
-  <text x="20" y="30" font-size="15" font-weight="600" fill="%s">%s</text>`,
+  <text x="20" y="30" font-size="%d" font-weight="600" fill="%s">%s</text>`,
 		width, height, width, height,
 		width-1, height-1, bg, stroke, strokeOpacity,
-		titleColor, escapeXML(title))
+		fontSize, titleColor, escapeXML(title))
+}
+
+// fitTitleFontSize picks the largest title font (between 11 and 15 px) at
+// which the title still fits in width − leftInset − rightSafety. Uses the
+// same 0.6 × font-size char-width estimate as the fit-the-frame test.
+func fitTitleFontSize(title string, width int) int {
+	const (
+		leftInset    = 20
+		rightSafety  = 4
+		minFont      = 11
+		maxFont      = 15
+		avgCharRatio = 0.6
+	)
+	budget := float64(width - leftInset - rightSafety)
+	chars := utf8.RuneCountInString(title)
+	if chars == 0 {
+		return maxFont
+	}
+	for fs := maxFont; fs >= minFont; fs-- {
+		if float64(chars)*float64(fs)*avgCharRatio <= budget {
+			return fs
+		}
+	}
+	return minFont
 }
 
 const footer = `