diff --git a/web/src/app/globals.css b/web/src/app/globals.css
index ddce3f83e..ff94aa9d2 100644
--- a/web/src/app/globals.css
+++ b/web/src/app/globals.css
@@ -1294,9 +1294,12 @@
   .journal-post-list li {
     border-bottom: 0;
   }
+  /* The date column is at least 120px and as wide as its date. At 120px a
+     two-digit Korean date (130px, "2026년 10월 29일") and a long English
+     one (159px, "SEPTEMBER 29, 2026") broke onto a second line. */
   .journal-post-list a {
     display: grid;
-    grid-template-columns: 1fr 120px 80px;
+    grid-template-columns: minmax(0, 1fr) minmax(120px, max-content) 80px;
     gap: 24px;
     align-items: baseline;
     padding-right: 104px;
@@ -1346,6 +1349,7 @@
   }
   .journal-list-meta {
     text-align: right;
+    white-space: nowrap;
   }
   .journal-list-body .pf-row-d {
     max-width: none;
diff --git a/web/src/components/journal/journalCss.test.ts b/web/src/components/journal/journalCss.test.ts
new file mode 100644
index 000000000..68df2697a
--- /dev/null
+++ b/web/src/components/journal/journalCss.test.ts
@@ -0,0 +1,62 @@
+// jsdom applies no stylesheet, so the journal's rules are read from
+// app/globals.css. Above 720px each archive row is a grid, and its date
+// column was a fixed 120px. On 27 October, at 1440, 27 of the 37 Korean dates
+// ("2026년 9월 29일" is 122px) and 17 of the 37 English ones ("SEPTEMBER 29,
+// 2026" is 159px) broke onto a second line, leaving 일 or 2026 alone under it.
+
+import { readFileSync } from "node:fs";
+import path from "node:path";
+import { describe, expect, it } from "vitest";
+
+const css = readFileSync(path.resolve(__dirname, "../../app/globals.css"), "utf8");
+
+/** Every rule with no braces inside it; an @media block's rules come out on their own. */
+function rules(source: string) {
+  const bare = source.replace(/\/\*[\s\S]*?\*\//g, "");
+  return [...bare.matchAll(/([^{}]+)\{([^{}]*)\}/g)].map((m) => ({
+    selectors: m[1].split(",").map((s) => s.trim().replace(/\s+/g, " ")),
+    body: m[2],
+  }));
+}
+
+function declaration(body: string, property: string) {
+  return body.match(new RegExp(`(?:^|;)\\s*${property}:\\s*([^;]+)`))?.[1].trim();
+}
+
+/** "minmax(0, 1fr) 120px 80px" → ["minmax(0, 1fr)", "120px", "80px"]. */
+function tracks(value: string) {
+  const out: string[] = [];
+  let depth = 0;
+  let current = "";
+  for (const ch of value) {
+    if (ch === "(") depth++;
+    if (ch === ")") depth--;
+    if (/\s/.test(ch) && depth === 0) {
+      if (current) out.push(current);
+      current = "";
+    } else {
+      current += ch;
+    }
+  }
+  if (current) out.push(current);
+  return out;
+}
+
+describe("journal archive dates", () => {
+  const all = rules(css);
+
+  it("sizes the date column to its date", () => {
+    const row = all.find(
+      (r) => r.selectors.includes(".journal-post-list a") && declaration(r.body, "display") === "grid",
+    );
+    expect(row, "no .journal-post-list a grid rule").toBeDefined();
+    const columns = tracks(declaration(row!.body, "grid-template-columns") ?? "");
+    expect(columns, "title, date, reading time").toHaveLength(3);
+    expect(columns[1], "the date track").toMatch(/max-content/);
+  });
+
+  it("keeps a date on one line", () => {
+    const own = all.filter((r) => r.selectors.includes(".journal-list-meta"));
+    expect(own.some((r) => declaration(r.body, "white-space") === "nowrap")).toBe(true);
+  });
+});