diff --git a/public/index.html b/public/index.html
index 7f62409..d0ceef2 100644
--- a/public/index.html
+++ b/public/index.html
@@ -5,7 +5,16 @@
     <link rel="icon" href="%PUBLIC_URL%/favicon.ico"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
     <meta name="theme-color" content="#ff0000"/>
-    <meta name="description" content="Interactive French Republican Calendar (a.k.a. French Revolutionary Calendar)."/>
+    <meta name="description" content="An interactive French Republican Calendar (a.k.a. French Revolutionary Calendar) that uses the original equinox method and never drifts out of sync with the seasons."/>
+    <meta property="og:title" content="French Republican Calendar"/>
+    <meta property="og:type" content="website"/>
+    <meta property="og:url" content="https://frcal.qt.ax/"/>
+    <meta property="og:description" content="An interactive French Republican Calendar (a.k.a. French Revolutionary Calendar) that uses the original equinox method and never drifts out of sync with the seasons."/>
+    <meta property="og:image" content="%PUBLIC_URL%/logo512.png"/>
+    <meta property="og:image:type" content="image/png" />
+    <meta property="og:image:width" content="512" />
+    <meta property="og:image:height" content="512" />
+    <meta property="og:image:alt" content="A calendar icon that displays the date 18 Brumaire." />
     <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png"/>
     <link rel="manifest" href="%PUBLIC_URL%/manifest.json"/>
     <title>French Republican Calendar (a.k.a. French Revolutionary Calendar)</title>