diff --git a/apps/www/components/Changelog/ChangelogMonthTabExplorer.tsx b/apps/www/components/Changelog/ChangelogMonthTabExplorer.tsx
new file mode 100644
index 00000000000..6a56ff8525f
--- /dev/null
+++ b/apps/www/components/Changelog/ChangelogMonthTabExplorer.tsx
@@ -0,0 +1,268 @@
+'use client'
+
+import type { ChangelogTimelineIndexItem } from '~/lib/changelog-github'
+import { githubChangelogLabelFilterUrl, githubLabelHex } from '~/lib/changelog.utils'
+import mdxComponents from '~/lib/mdx/mdxComponents'
+import dayjs from 'dayjs'
+import { GitCommit } from 'lucide-react'
+import type { MDXRemoteSerializeResult } from 'next-mdx-remote'
+import { MDXRemote } from 'next-mdx-remote'
+import Link from 'next/link'
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import { GenericSkeletonLoader } from 'ui-patterns/ShimmeringLoader'
+
+import 'ui-patterns/ShimmeringLoader/index.css'
+
+import { cn } from 'ui'
+
+function groupByMonthSorted(
+  items: ChangelogTimelineIndexItem[]
+): { key: string; label: string; entries: ChangelogTimelineIndexItem[] }[] {
+  const filtered = items.filter((i) => !i.title.includes('[d]'))
+  const map = new Map<string, ChangelogTimelineIndexItem[]>()
+  for (const item of filtered) {
+    const key = dayjs(item.sortDate).format('YYYY-MM')
+    if (!map.has(key)) map.set(key, [])
+    map.get(key)!.push(item)
+  }
+  return [...map.entries()]
+    .sort((a, b) => b[0].localeCompare(a[0]))
+    .map(([key, entries]) => ({
+      key,
+      label: dayjs(`${key}-01`).format('MMM YYYY'),
+      entries,
+    }))
+}
+
+type FetchedDoc = {
+  number: number
+  title: string
+  url: string
+  created_at: string
+  source: MDXRemoteSerializeResult | null
+  error?: string
+}
+
+type Props = {
+  items: ChangelogTimelineIndexItem[]
+}
+
+export function ChangelogMonthTabExplorer({ items }: Props) {
+  const groups = useMemo(() => groupByMonthSorted(items), [items])
+  const [activeKey, setActiveKey] = useState<string | null>(null)
+  const tabRefs = useRef<Map<string, HTMLButtonElement>>(new Map())
+  const [docs, setDocs] = useState<FetchedDoc[]>([])
+  const [loadingDocs, setLoadingDocs] = useState(false)
+
+  useEffect(() => {
+    if (activeKey === null && groups.length > 0) {
+      setActiveKey(groups[0]!.key)
+    }
+  }, [activeKey, groups])
+
+  const activeEntries = useMemo(() => {
+    if (!activeKey) return []
+    return groups.find((g) => g.key === activeKey)?.entries ?? []
+  }, [activeKey, groups])
+
+  useEffect(() => {
+    if (!activeKey || activeEntries.length === 0) {
+      setDocs([])
+      setLoadingDocs(false)
+      return
+    }
+
+    let cancelled = false
+    setLoadingDocs(true)
+    setDocs([])
+
+    void (async () => {
+      const rows: FetchedDoc[] = await Promise.all(
+        activeEntries.map(async (item) => {
+          try {
+            const res = await fetch(`/api/changelog-discussion/${item.number}`)
+            if (!res.ok) {
+              return {
+                number: item.number,
+                title: item.title,
+                url: item.url,
+                created_at: item.sortDate,
+                source: null,
+                error: res.status === 404 ? 'Not found' : 'Could not load',
+              }
+            }
+            const data = (await res.json()) as {
+              title: string
+              url: string
+              created_at: string
+              source: MDXRemoteSerializeResult
+            }
+            return {
+              number: item.number,
+              title: data.title,
+              url: data.url,
+              created_at: data.created_at,
+              source: data.source,
+            }
+          } catch {
+            return {
+              number: item.number,
+              title: item.title,
+              url: item.url,
+              created_at: item.sortDate,
+              source: null,
+              error: 'Network error',
+            }
+          }
+        })
+      )
+      if (cancelled) return
+      setDocs(rows)
+      setLoadingDocs(false)
+    })()
+
+    return () => {
+      cancelled = true
+      setLoadingDocs(false)
+    }
+  }, [activeKey, activeEntries])
+
+  const setTabRef = useCallback((key: string, el: HTMLButtonElement | null) => {
+    if (el) tabRefs.current.set(key, el)
+    else tabRefs.current.delete(key)
+  }, [])
+
+  useEffect(() => {
+    if (!activeKey) return
+    const el = tabRefs.current.get(activeKey)
+    el?.scrollIntoView({ behavior: 'smooth', inline: 'center', block: 'nearest' })
+  }, [activeKey])
+
+  const indexByNumber = useMemo(() => {
+    const m = new Map<number, ChangelogTimelineIndexItem>()
+    for (const item of items) {
+      m.set(item.number, item)
+    }
+    return m
+  }, [items])
+
+  if (groups.length === 0) {
+    return <p className="text-foreground-lighter text-sm">No changelog entries loaded.</p>
+  }
+
+  return (
+    <div className="flex flex-col">
+      <div className="border-default bg-default/90 supports-[backdrop-filter]:bg-default/90 sticky top-[65px] z-30 py-3 backdrop-blur-md">
+        <div className="border-default overflow-hidden rounded-full border bg-surface-100 shadow-sm">
+          <div
+            className="flex flex-nowrap gap-1.5 overflow-x-auto overflow-y-hidden px-2 py-2 sm:gap-2 sm:px-3 [&::-webkit-scrollbar]:hidden [-ms-overflow-style:none] [scrollbar-width:none]"
+            role="tablist"
+            aria-label="Changelog by month"
+          >
+            {groups.map(({ key, label }) => {
+              const selected = key === activeKey
+              return (
+                <button
+                  key={key}
+                  type="button"
+                  role="tab"
+                  aria-selected={selected}
+                  ref={(el) => setTabRef(key, el)}
+                  onClick={() => setActiveKey(key)}
+                  className={cn(
+                    'px-3 py-1.5 text-sm whitespace-nowrap transition-colors',
+                    selected
+                      ? 'text-foreground'
+                      : 'text-foreground-lighter hover:text-foreground shrink-0'
+                  )}
+                >
+                  {label}
+                </button>
+              )
+            })}
+          </div>
+        </div>
+      </div>
+
+      <div className="min-h-[40vh] pt-6">
+        {loadingDocs && (
+          <div className="border-muted rounded-lg border p-6">
+            <GenericSkeletonLoader />
+          </div>
+        )}
+
+        {!loadingDocs && activeEntries.length === 0 && (
+          <p className="text-foreground-lighter p-6 text-sm">Nothing in this month.</p>
+        )}
+
+        {!loadingDocs && activeEntries.length > 0 && (
+          <div className="grid">
+            {docs.map((doc) => {
+              const indexItem = indexByNumber.get(doc.number)
+              const labels = indexItem?.labels ?? []
+
+              return (
+                <div
+                  key={doc.number}
+                  className="border-muted grid pb-12 lg:grid-cols-12 lg:gap-8 lg:border-l lg:pb-36"
+                >
+                  <div className="col-span-12 mb-8 self-start lg:sticky lg:top-0 lg:col-span-4 lg:-mt-32 lg:pt-32">
+                    <div className="flex w-full items-baseline border-b pb-4 lg:gap-4 lg:border-none lg:pb-0">
+                      <div className="hidden lg:flex bg-border border-muted text-foreground-lighter -ml-2.5 h-5 w-5 items-center justify-center rounded border drop-shadow-sm">
+                        <GitCommit size={14} strokeWidth={1.5} />
+                      </div>
+                      <div className="flex w-full flex-col gap-1">
+                        {doc.title && (
+                          <Link href={doc.url} className="text-foreground text-lg hover:underline">
+                            {doc.title}
+                          </Link>
+                        )}
+                        <p className="text-foreground-lighter text-xs font-mono">
+                          {dayjs(doc.created_at).format('MMM D, YYYY')}
+                        </p>
+                        {labels.length > 0 && (
+                          <div className="flex flex-wrap gap-1.5 pt-1.5">
+                            {labels.map((label) => (
+                              <a
+                                key={`${doc.number}-${label.name}`}
+                                href={githubChangelogLabelFilterUrl(label.name)}
+                                target="_blank"
+                                rel="noopener noreferrer"
+                                className="inline-flex no-underline focus-visible:ring-brand-default rounded-md focus-visible:ring-2 focus-visible:ring-offset-2 focus-visible:outline-none"
+                              >
+                                <span
+                                  className="border-default bg-surface-200 text-foreground-light rounded-md border border-l-[3px] px-1.5 py-px text-[11px] font-medium leading-tight"
+                                  style={{
+                                    borderLeftColor: `#${githubLabelHex(label.color)}`,
+                                  }}
+                                >
+                                  {label.name}
+                                </span>
+                              </a>
+                            ))}
+                          </div>
+                        )}
+                        {doc.error && (
+                          <p className="text-destructive-600 pt-1 text-xs">{doc.error}</p>
+                        )}
+                      </div>
+                    </div>
+                  </div>
+                  <div className="col-span-8 lg:max-w-[calc(100vw-80px)]">
+                    {doc.source ? (
+                      <article className="prose prose-docs max-w-none [overflow-wrap:break-word]">
+                        <MDXRemote {...doc.source} components={mdxComponents('blog')} />
+                      </article>
+                    ) : (
+                      !doc.error && <p className="text-foreground-lighter text-sm">No content.</p>
+                    )}
+                  </div>
+                </div>
+              )
+            })}
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}
diff --git a/apps/www/pages/changelog-v4.tsx b/apps/www/pages/changelog-v4.tsx
new file mode 100644
index 00000000000..807cb1385a3
--- /dev/null
+++ b/apps/www/pages/changelog-v4.tsx
@@ -0,0 +1,61 @@
+import { ChangelogMonthTabExplorer } from '~/components/Changelog/ChangelogMonthTabExplorer'
+import CTABanner from '~/components/CTABanner'
+import DefaultLayout from '~/components/Layouts/Default'
+import type { ChangelogTimelineIndexItem } from '~/lib/changelog-github'
+import { getChangelogTimelineSortedIndex } from '~/lib/changelog-github'
+import type { GetServerSideProps } from 'next'
+import { NextSeo } from 'next-seo'
+import Link from 'next/link'
+
+type PageProps = {
+  changelogIndex: ChangelogTimelineIndexItem[]
+}
+
+export const getServerSideProps: GetServerSideProps<PageProps> = async ({ res }) => {
+  res.setHeader('Cache-Control', 'public, max-age=900, stale-while-revalidate=900')
+  try {
+    const changelogIndex = await getChangelogTimelineSortedIndex()
+    return { props: { changelogIndex } }
+  } catch (e) {
+    console.error(e)
+    return { props: { changelogIndex: [] } }
+  }
+}
+
+export default function ChangelogV4MonthTabsPage({ changelogIndex }: PageProps) {
+  return (
+    <>
+      <NextSeo
+        title="Changelog (v4 — month tabs)"
+        description="Experimental month tabs with sticky tab strip"
+        openGraph={{
+          title: 'Changelog (v4 month tabs)',
+          url: 'https://supabase.com/changelog-v4',
+          type: 'article',
+        }}
+      />
+      <DefaultLayout>
+        <div className="container mx-auto max-w-5xl flex flex-col gap-6 px-4 py-10 sm:px-16 xl:px-20">
+          <div>
+            <h1 className="h1">Changelog</h1>
+            <p className="text-foreground-lighter mt-2 text-lg">
+              Month tabs experiment — strip stays sticky while you scroll. Full entries load for
+              the selected month (same MDX as the main changelog).{' '}
+              <Link href="/changelog-v3" className="text-brand-link hover:underline">
+                v3 timeline
+              </Link>
+              {' · '}
+              <Link href="/changelog-v3-modal" className="text-brand-link hover:underline">
+                v3 modal
+              </Link>
+              .
+            </p>
+          </div>
+
+          <ChangelogMonthTabExplorer items={changelogIndex} />
+        </div>
+        <CTABanner />
+      </DefaultLayout>
+    </>
+  )
+}