diff --git a/lib/sup/xapian_index.rb b/lib/sup/xapian_index.rb
index <HASH>..<HASH> 100644
--- a/lib/sup/xapian_index.rb
+++ b/lib/sup/xapian_index.rb
@@ -440,7 +440,7 @@ EOS
       :message_id => m.id,
       :source_id => m.source.id,
       :source_info => m.source_info,
-      :date => m.date,
+      :date => truncate_date(m.date),
       :snippet => snippet,
       :labels => m.labels.to_a,
       :from => [m.from.email, m.from.name],
prevent "year too big to marshal" crashes

Xapian::Document#entry= performs a Marshal.dump which was throwing a
"year too big to marshal" when adding a new message.  I just
truncate_date'd the message's date when the entry hash is created in
sync_message and this problem went away for me.

It was a spam message, as the MIN_DATE/MAX_DATE comments hinted.