diff --git a/crates/api/src/community.rs b/crates/api/src/community.rs
index ef7daeb40..c8b44aceb 100644
--- a/crates/api/src/community.rs
+++ b/crates/api/src/community.rs
@@ -259,6 +259,7 @@ impl Perform for BanFromCommunity {
         &community,
         &banned_person,
         &local_user_view.person.clone().into(),
+        expires,
         context,
       )
       .await?;
diff --git a/crates/apub/assets/lemmy/activities/community/block_user.json b/crates/apub/assets/lemmy/activities/community/block_user.json
index 9ca00816d..4d43e086e 100644
--- a/crates/apub/assets/lemmy/activities/community/block_user.json
+++ b/crates/apub/assets/lemmy/activities/community/block_user.json
@@ -9,5 +9,6 @@
   ],
   "target": "http://enterprise.lemmy.ml/c/main",
   "type": "Block",
+  "expires": "2021-11-01T12:23:50.151874+00:00",
   "id": "http://enterprise.lemmy.ml/activities/block/5d42fffb-0903-4625-86d4-0b39bb344fc2"
-}
\ No newline at end of file
+}
diff --git a/crates/apub/src/activities/community/block_user.rs b/crates/apub/src/activities/community/block_user.rs
index 92a7ba8a2..f5a6f02ce 100644
--- a/crates/apub/src/activities/community/block_user.rs
+++ b/crates/apub/src/activities/community/block_user.rs
@@ -12,6 +12,7 @@ use crate::{
   protocol::activities::community::block_user::BlockUserFromCommunity,
 };
 use activitystreams_kinds::{activity::BlockType, public};
+use chrono::NaiveDateTime;
 use lemmy_api_common::blocking;
 use lemmy_apub_lib::{
   data::Data,
@@ -27,7 +28,7 @@ use lemmy_db_schema::{
   },
   traits::{Bannable, Followable},
 };
-use lemmy_utils::LemmyError;
+use lemmy_utils::{utils::convert_datetime, LemmyError};
 use lemmy_websocket::LemmyContext;
 
 impl BlockUserFromCommunity {
@@ -35,6 +36,7 @@ impl BlockUserFromCommunity {
     community: &ApubCommunity,
     target: &ApubPerson,
     actor: &ApubPerson,
+    expires: Option<NaiveDateTime>,
     context: &LemmyContext,
   ) -> Result<BlockUserFromCommunity, LemmyError> {
     Ok(BlockUserFromCommunity {
@@ -48,6 +50,7 @@ impl BlockUserFromCommunity {
         BlockType::Block,
         &context.settings().get_protocol_and_hostname(),
       )?,
+      expires: expires.map(convert_datetime),
       unparsed: Default::default(),
     })
   }
@@ -57,9 +60,10 @@ impl BlockUserFromCommunity {
     community: &ApubCommunity,
     target: &ApubPerson,
     actor: &ApubPerson,
+    expires: Option<NaiveDateTime>,
     context: &LemmyContext,
   ) -> Result<(), LemmyError> {
-    let block = BlockUserFromCommunity::new(community, target, actor, context)?;
+    let block = BlockUserFromCommunity::new(community, target, actor, expires, context)?;
     let block_id = block.id.clone();
 
     let activity = AnnouncableActivities::BlockUserFromCommunity(block);
@@ -101,8 +105,7 @@ impl ActivityHandler for BlockUserFromCommunity {
     let community_user_ban_form = CommunityPersonBanForm {
       community_id: community.id,
       person_id: blocked_user.id,
-      // TODO how to carry across the ban expiration time?
-      expires: None,
+      expires: Some(self.expires.map(|u| u.naive_local())),
     };
 
     blocking(context.pool(), move |conn: &'_ _| {
diff --git a/crates/apub/src/activities/community/undo_block_user.rs b/crates/apub/src/activities/community/undo_block_user.rs
index e93f4ff29..a62315ddd 100644
--- a/crates/apub/src/activities/community/undo_block_user.rs
+++ b/crates/apub/src/activities/community/undo_block_user.rs
@@ -36,7 +36,7 @@ impl UndoBlockUserFromCommunity {
     actor: &ApubPerson,
     context: &LemmyContext,
   ) -> Result<(), LemmyError> {
-    let block = BlockUserFromCommunity::new(community, target, actor, context)?;
+    let block = BlockUserFromCommunity::new(community, target, actor, None, context)?;
 
     let id = generate_activity_id(
       UndoType::Undo,
diff --git a/crates/apub/src/protocol/activities/community/block_user.rs b/crates/apub/src/protocol/activities/community/block_user.rs
index ecde0ce3a..891fe1f55 100644
--- a/crates/apub/src/protocol/activities/community/block_user.rs
+++ b/crates/apub/src/protocol/activities/community/block_user.rs
@@ -3,6 +3,7 @@ use crate::{
   protocol::Unparsed,
 };
 use activitystreams_kinds::activity::BlockType;
+use chrono::{DateTime, FixedOffset};
 use lemmy_apub_lib::object_id::ObjectId;
 use serde::{Deserialize, Serialize};
 use url::Url;
@@ -22,4 +23,5 @@ pub struct BlockUserFromCommunity {
   pub(crate) id: Url,
   #[serde(flatten)]
   pub(crate) unparsed: Unparsed,
+  pub(crate) expires: Option<DateTime<FixedOffset>>,
 }