feat: add GraphQL Day Amsterdam 2026 (#2377)

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Closes #<issue number>

## Description

<!-- Write a brief description of the changes introduced by this PR -->

Author: vliegveld5

src/app/day/2026/amsterdam/page.tsx

@@ -1,6 +1,85 @@
-// Amsterdam is TBC — redirect to /day until confirmed
-import { redirect } from "next/navigation"
+import { Metadata } from "next"
+
+import { Button } from "@/app/conf/_design-system/button"
+import { Hero, HeroDateAndLocation } from "../components/hero"
+import { AboutSection } from "../components/about-section"
+import { WhyAttendSection } from "../components/why-attend-section"
+import {
+  BecomeASpeakerSection,
+  CfpButton,
+} from "../components/become-a-speaker"
+import { EventPartnersSection } from "../components/event-partners"
+import { CtaCardSection } from "../components/cta-card-section"
+import { MarqueeRows } from "@/app/conf/2026/components/marquee-rows"
+import { PastSpeakersSection } from "../components/past-speakers"
+import { NavbarPlaceholder } from "../components/navbar"
+import { GallerySection } from "../../gallery-section"
+
+const MARQUEE_ITEMS = [
+  ["AMSTERDAM", "JUNE 2026", "GRAPHQL DAY", "FOST", "COMMUNITY", "APIs"],
+  [
+    "OPEN SOURCE",
+    "WORKSHOPS",
+    "FEDERATION",
+    "DEVELOPER EXPERIENCE",
+    "GRAPHQL DAY",
+    "AMSTERDAM",
+  ],
+]
+
+export const metadata: Metadata = {
+  title: "GraphQL Day @ FOST AMSTERDAM — June 9-10",
+}
 
 export default function AmsterdamPage() {
-  redirect("/day")
+  return (
+    <>
+      <NavbarPlaceholder className="top-0 bg-neu-100 before:bg-white/30 dark:bg-neu-50/50 dark:before:bg-blk/40" />
+      <main className="gql-all-anchors-focusable">
+        <Hero subtitle="@ FOST Amsterdam" colorScheme="neutral">
+          <HeroDateAndLocation
+            date="Jun 9-10, 2026"
+            dateTime="2026-06-09"
+            location="Amsterdam, The Netherlands"
+          />
+          <div className="flex flex-wrap items-center gap-x-4 gap-y-2 max-sm:*:flex-1">
+            <Button disabled className="whitespace-nowrap opacity-55 md:w-fit">
+              Tickets coming soon
+            </Button>
+            <CfpButton className="whitespace-nowrap md:w-fit" />
+          </div>
+        </Hero>
+        <AboutSection />
+        <MarqueeRows
+          variant="primary"
+          className="z-10 bg-neu-0 py-4 max-sm:pb-1 sm:py-6 md:space-y-2 md:py-12"
+          items={MARQUEE_ITEMS}
+        />
+        <div className="gql-container gql-conf-navbar-strip text-neu-900 before:bg-white/40 before:dark:bg-blk/30">
+          <WhyAttendSection />
+          <BecomeASpeakerSection />
+          <PastSpeakersSection />
+          <EventPartnersSection />
+          <GallerySection moving />
+          <CtaCardSection
+            title="Stay tuned"
+            description="Join us for a day of GraphQL talks, networking, and hands-on learning at FOST Amsterdam."
+          >
+            <Button
+              disabled
+              variant="primary"
+              className="whitespace-nowrap opacity-55"
+            >
+              Tickets coming soon
+            </Button>
+          </CtaCardSection>
+          <MarqueeRows
+            variant="secondary"
+            className="my-8 xl:mb-16 xl:mt-10"
+            items={MARQUEE_ITEMS}
+          />
+        </div>
+      </main>
+    </>
+  )
 }

src/app/day/events-data.ts

@@ -24,15 +24,14 @@ export const EVENTS: EventMapItem[] = [
     lon: -74.006,
     lat: 40.7128,
   },
-  // Amsterdam TBC — uncomment when confirmed
-  // {
-  //   id: "amsterdam",
-  //   city: "Amsterdam",
-  //   date: "Jun 9-10 [TBC]",
-  //   href: "/day/2026/amsterdam",
-  //   lon: 4.9041,
-  //   lat: 52.3676,
-  // },
+  {
+    id: "amsterdam",
+    city: "Amsterdam",
+    date: "Jun 9-10",
+    href: "/day/2026/amsterdam",
+    lon: 4.9041,
+    lat: 52.3676,
+  },
   {
     id: "melbourne",
     city: "Melbourne",