diff --git a/docs/api/openapi.yaml b/docs/api/openapi.yaml
index f184cd224..86bb5ba01 100644
--- a/docs/api/openapi.yaml
+++ b/docs/api/openapi.yaml
@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: HealthLog API
-  version: 1.5.6
+  version: 1.6.0
   description: >-
     Self-hosted personal-health-tracking PWA — public API surface for the iOS native client and external ingest.
 
diff --git a/e2e/medications-wizard-helpers.ts b/e2e/medications-wizard-helpers.ts
index a0386d431..5f4352c2e 100644
--- a/e2e/medications-wizard-helpers.ts
+++ b/e2e/medications-wizard-helpers.ts
@@ -124,6 +124,23 @@ export async function stubDashboardAnalytics(page: Page): Promise<void> {
  * redirects to `/medications?new=1` and opens the create dialog).
  */
 export async function openCreateWizard(page: Page): Promise<void> {
+  // Pin the German locale for the wizard flow. The app default locale is
+  // English; these specs assert the "Schritt N von M" counter and other
+  // German label surfaces, which only render when the `healthlog-locale`
+  // cookie resolves to "de". Both the server layout and the client i18n
+  // provider read this exact cookie name, so setting it before the first
+  // navigation makes the dialog render German on first paint. Scoped here
+  // rather than in the shared auth state so English-asserting specs keep
+  // the default locale.
+  await page.context().addCookies([
+    {
+      name: "healthlog-locale",
+      value: "de",
+      url: page.url().startsWith("http")
+        ? new URL(page.url()).origin
+        : "http://localhost:3000",
+    },
+  ]);
   await page.goto("/medications/new", { waitUntil: "domcontentloaded" });
   await expect(
     page.locator('[data-slot="medication-wizard-dialog"]'),
diff --git a/e2e/setup/global-setup.ts b/e2e/setup/global-setup.ts
index e57e6897f..af5dc2844 100644
--- a/e2e/setup/global-setup.ts
+++ b/e2e/setup/global-setup.ts
@@ -181,7 +181,7 @@ export default async function globalSetup(config: FullConfig): Promise<void> {
   // already-onboarded ones, so for our pre-seeded completed e2e user
   // the cookie is absent and the proxy passes the dashboard through.
   state.cookies = state.cookies.filter((c) =>
-    ["healthlog_session", "healthlog_locale", "hl_onboarding"].includes(c.name),
+    ["healthlog_session", "healthlog-locale", "hl_onboarding"].includes(c.name),
   );
   await writeFile(STORAGE_STATE_PATH, JSON.stringify(state, null, 2));
   await ctx.dispose();
diff --git a/tests/integration/medication-cadence-worker.test.ts b/tests/integration/medication-cadence-worker.test.ts
index dbf09a46f..c0adee4e5 100644
--- a/tests/integration/medication-cadence-worker.test.ts
+++ b/tests/integration/medication-cadence-worker.test.ts
@@ -133,6 +133,26 @@ async function loadCanonical(medicationId: string): Promise<{
  * matching `getUserTodayBounds` in `src/lib/timezone.ts` so the test
  * window matches what the worker would build on that tick.
  */
+// UTC midnight on the local calendar day that `now` falls within for `tz`.
+// Mirrors the column convention for `startsOn`/`endsOn` (stored as
+// `...T00:00:00.000Z` on the local calendar day). Deriving the day from
+// the same timezone `todayBounds` uses keeps a one-shot's emit day inside
+// the checked window regardless of wall-clock time — reading the UTC date
+// instead drifts a day late in the UTC evening when the local zone has
+// already rolled into the next calendar day.
+function localCalendarMidnightUtc(now: Date, tz: string): Date {
+  const parts = new Intl.DateTimeFormat("en-CA", {
+    timeZone: tz,
+    year: "numeric",
+    month: "2-digit",
+    day: "2-digit",
+  }).formatToParts(now);
+  const y = Number(parts.find((p) => p.type === "year")?.value);
+  const m = Number(parts.find((p) => p.type === "month")?.value);
+  const d = Number(parts.find((p) => p.type === "day")?.value);
+  return new Date(Date.UTC(y, m - 1, d, 0, 0, 0, 0));
+}
+
 function todayBounds(now: Date, tz: string): { start: Date; end: Date } {
   const parts = new Intl.DateTimeFormat("en-CA", {
     timeZone: tz,
@@ -467,17 +487,7 @@ describe("one-shot lifecycle", () => {
   it("mints the slot, the intake POST flips medication.active to false", async () => {
     const prisma = getPrismaClient();
     const today = new Date();
-    const todayDate = new Date(
-      Date.UTC(
-        today.getUTCFullYear(),
-        today.getUTCMonth(),
-        today.getUTCDate(),
-        0,
-        0,
-        0,
-        0,
-      ),
-    );
+    const todayDate = localCalendarMidnightUtc(today, "Europe/Berlin");
 
     const med = await prisma.medication.create({
       data: {
@@ -543,17 +553,7 @@ describe("one-shot lifecycle", () => {
   it("does NOT deactivate when the intake is skipped", async () => {
     const prisma = getPrismaClient();
     const today = new Date();
-    const todayDate = new Date(
-      Date.UTC(
-        today.getUTCFullYear(),
-        today.getUTCMonth(),
-        today.getUTCDate(),
-        0,
-        0,
-        0,
-        0,
-      ),
-    );
+    const todayDate = localCalendarMidnightUtc(today, "Europe/Berlin");
 
     const med = await prisma.medication.create({
       data: {