diff --git a/website/agenda/planung/pot/de/studio-timeslots.po b/website/agenda/planung/pot/de/studio-timeslots.po
index ba19bb0..5a327e1 100644
--- a/website/agenda/planung/pot/de/studio-timeslots.po
+++ b/website/agenda/planung/pot/de/studio-timeslots.po
@@ -58,6 +58,9 @@ msgstr "wöchentlich"
 msgid "every_two_weeks"
 msgstr "alle 14 Tage"
 
+msgid "every_four_weeks"
+msgstr "alle 28 Tage"
+
 msgid "every_month"
 msgstr "monatlich"
 
diff --git a/website/agenda/planung/pot/en/studio-timeslots.po b/website/agenda/planung/pot/en/studio-timeslots.po
index 1fe2b8e..b7b414f 100644
--- a/website/agenda/planung/pot/en/studio-timeslots.po
+++ b/website/agenda/planung/pot/en/studio-timeslots.po
@@ -58,6 +58,9 @@ msgstr "weekly"
 msgid "every_two_weeks"
 msgstr "every two weeks"
 
+msgid "every_four_weeks"
+msgstr "every four weeks"
+
 msgid "every_month"
 msgstr "every month"
 
diff --git a/website/agenda/planung/templates/studio-timeslots.html b/website/agenda/planung/templates/studio-timeslots.html
index 7285d8d..d5803a0 100644
--- a/website/agenda/planung/templates/studio-timeslots.html
+++ b/website/agenda/planung/templates/studio-timeslots.html
@@ -49,7 +49,7 @@
                             <option value="1"><TMPL_VAR .loc.daily></option>
                             <option value="7"><TMPL_VAR .loc.weekly></option>
                             <option value="14"><TMPL_VAR .loc.every_two_weeks></option>
-                            <option value="28"><TMPL_VAR .loc.every_month></option>
+                            <option value="28"><TMPL_VAR .loc.every_four_weeks></option>
                         </select>					
 					</div>
 					<div class="cell weekday"></div>