From b3a9ba09ec5867d240c3769ae4c3fbf598f68d92 Mon Sep 17 00:00:00 2001
From: Mark Felder <feld@FreeBSD.org>
Date: Tue, 29 Sep 2020 12:16:15 -0500
Subject: [PATCH] More robust expires_at timestamp processing

---
 lib/pleroma/user.ex | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 71ace1c34..09ea80793 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -2291,7 +2291,9 @@ defmodule Pleroma.User do
 
     # if pinned activity was scheduled for deletion, we reschedule it for deletion
     if data["expires_at"] do
-      {:ok, expires_at, _} = DateTime.from_iso8601(data["expires_at"])
+      # MRF.ActivityExpirationPolicy used UTC timestamps for expires_at in original implementation
+      {:ok, expires_at} =
+        data["expires_at"] |> Pleroma.EctoType.ActivityPub.ObjectValidators.DateTime.cast()
 
       Pleroma.Workers.PurgeExpiredActivity.enqueue(%{
         activity_id: id,