diff --git a/autoload/vimwiki/diary.vim b/autoload/vimwiki/diary.vim
index 70b3df3..d3c5d74 100644
--- a/autoload/vimwiki/diary.vim
+++ b/autoload/vimwiki/diary.vim
@@ -512,10 +512,14 @@ endfunction
 
 function! vimwiki#diary#calendar_sign(day, month, year) abort
   " Callback function for Calendar.vim
+  " Clause: no wiki no sign #290
+  if len(g:vimwiki_list) <= 0
+    return
+  endif
   let day = s:prefix_zero(a:day)
   let month = s:prefix_zero(a:month)
-  let sfile = vimwiki#vars#get_wikilocal('path').vimwiki#vars#get_wikilocal('diary_rel_path').
-        \ a:year.'-'.month.'-'.day.vimwiki#vars#get_wikilocal('ext')
+  let sfile = vimwiki#vars#get_wikilocal('path') . vimwiki#vars#get_wikilocal('diary_rel_path')
+        \ . a:year.'-'.month.'-'.day.vimwiki#vars#get_wikilocal('ext')
   return filereadable(expand(sfile))
 endfunction
 
diff --git a/doc/vimwiki.txt b/doc/vimwiki.txt
index afdc7e0..e55d027 100644
--- a/doc/vimwiki.txt
+++ b/doc/vimwiki.txt
@@ -3925,6 +3925,8 @@ http://code.google.com/p/vimwiki/issues/list. They may be accessible from
 https://github.com/vimwiki-backup/vimwiki/issues.
 
 New:~
+    * Issue #290: Calendar plugin, do not sign if no wiki
+    * Issue #281: Permit `\|` in tables
     * PR #1128: VimwikiGoto: Support wiki pages with spaces
     * Feature: Add option to use link Description in default syntax if
       caption is present. |generated_links_caption|