diff --git a/calvin/parts/header.html b/calvin/parts/header.html
new file mode 100644
index 0000000000..e8903e336c
--- /dev/null
+++ b/calvin/parts/header.html
@@ -0,0 +1 @@
+<!-- wp:pattern {"slug":"blockbase/header-minimal"} /-->
diff --git a/calvin/readme.txt b/calvin/readme.txt
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--- /dev/null
+++ b/calvin/readme.txt
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+=== Calvin ===
+Contributors: Automattic
+Requires at least: 5.8
+Tested up to: 5.8
+Requires PHP: 5.7
+License: GPLv2 or later
+License URI: http://www.gnu.org/licenses/gpl-2.0.html
+
+== Description ==
+
+Calvin is a minimalist theme, designed for single-page websites.
+
+== Changelog ==
+
+= 1.0.0 =
+* Initial release
+
+== Copyright ==
+
+Calvin WordPress Theme, (C) 2021 Automattic
+Calvin is distributed under the terms of the GNU GPL.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+Calvin uses the following third-party resources:
+
+Blossoming Cherry on a Moonlit Night (ca. 1932) by Ohara Koson (1877–1945). Original from the Los Angeles County Museum of Art. 
+Digitally enhanced by rawpixel.
+Source: https://www.rawpixel.com/image/2439637/free-illustration-image-moon-japanese-art
+Used in theme screenshot and demo site.
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diff --git a/calvin/screenshot.png b/calvin/screenshot.png
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index 0000000000..d5ffc5ef85
Binary files /dev/null and b/calvin/screenshot.png differ
diff --git a/calvin/style.css b/calvin/style.css
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+++ b/calvin/style.css
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+/*
+Theme Name: Calvin
+Theme URI: https://wordpress.com/theme/calvin
+Author: Automattic
+Author URI: https://automattic.com/
+Description: Calvin is a minimalist theme, designed for single-page websites.
+Requires at least: 5.8
+Tested up to: 5.8
+Requires PHP: 5.7
+Version: 1.0.0
+License: GNU General Public License v2 or later
+License URI: https://raw.githubusercontent.com/Automattic/themes/trunk/LICENSE
+Template: blockbase
+Text Domain: calvin
+Tags: one-column, custom-colors, custom-menu, custom-logo, editor-style, featured-images, full-site-editing, rtl-language-support, theme-options, threaded-comments, translation-ready, wide-blocks, auto-loading-homepage
+
+Calvin WordPress Theme, (C) 2021 Automattic
+Calvin is distributed under the terms of the GNU GPL.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+Calvin uses the following third-party resources:
+
+Blossoming Cherry on a Moonlit Night (ca. 1932) by Ohara Koson (1877–1945). Original from the Los Angeles County Museum of Art. 
+Digitally enhanced by rawpixel.
+Source: https://www.rawpixel.com/image/2439637/free-illustration-image-moon-japanese-art
+Used in theme screenshot and demo site.
+*/
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diff --git a/calvin/theme.json b/calvin/theme.json
new file mode 100644
index 0000000000..963a46e050
--- /dev/null
+++ b/calvin/theme.json
@@ -0,0 +1,48 @@
+{
+    "version": 2,
+    "settings": {
+        "color": {
+            "palette": [
+                {
+                    "slug": "foreground",
+                    "color": "#E2E4E8",
+                    "name": "Foreground",
+                    "default": "#ffffff"
+                },
+                {
+                    "slug": "background",
+                    "color": "#001844",
+                    "name": "Background",
+                    "default": "#000000"
+                }
+            ]
+        },
+        "typography": {
+            "fontFamilies": [
+                {
+                    "fontFamily": "\"Roboto\", sans-serif",
+                    "slug": "body-font",
+                    "name": "Body (Roboto)",
+                    "google": "family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,800;1,900",
+                    "fontSlug": "roboto"
+                },
+                {
+                    "fontFamily": "\"Roboto\", sans-serif",
+                    "slug": "heading-font",
+                    "name": "Heading (Roboto)",
+                    "google": "family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,800;1,900",
+                    "fontSlug": "roboto"
+                }
+            ]
+        },
+        "custom": {
+            "color": {
+                "foreground": "var(--wp--preset--color--foreground)",
+                "background": "var(--wp--preset--color--background)",
+                "primary": "var(--wp--preset--color--foreground)",
+                "secondary": "var(--wp--preset--color--foreground)",
+                "tertiary": "var(--wp--preset--color--background)"
+            }
+        }
+    }
+}
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