diff --git src/wp-content/themes/twentyseventeen/assets/css/blocks.css src/wp-content/themes/twentyseventeen/assets/css/blocks.css
index 46ecf2ca15..fdfe2ba3de 100644
--- src/wp-content/themes/twentyseventeen/assets/css/blocks.css
+++ src/wp-content/themes/twentyseventeen/assets/css/blocks.css
@@ -328,6 +328,13 @@ p.has-drop-cap:not(:focus)::first-letter {
 	text-align: center;
 }
 
+.wp-block-archives.alignright,
+.wp-block-categories.alignright,
+.wp-block-latest-posts.alignright {
+	list-style-position: inside;
+	text-align: right;
+}
+
 /* Comments */
 
 .wp-block-latest-comments article {
diff --git src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css
index 00c36a3293..b232fcc282 100644
--- src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css
+++ src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css
@@ -823,6 +823,17 @@ table.wp-block-table td:last-child {
 	margin-right: 0;
 }
 
+.wp-block[data-align="left"] {
+    text-align: left;
+}
+.wp-block[data-align="center"] {
+    text-align: center;
+}
+
+.wp-block[data-align="right"] {
+    text-align: right;
+}
+
 /* Search */
 
 .wp-block-search__button {