diff --git a/lib/reducers/calendar-filters-reducer.js b/lib/reducers/calendar-filters-reducer.js
--- a/lib/reducers/calendar-filters-reducer.js
+++ b/lib/reducers/calendar-filters-reducer.js
@@ -17,6 +17,7 @@
   filteredThreadIDs,
   nonThreadCalendarFilters,
   nonExcludeDeletedCalendarFilters,
+  nonCommunityCalendarFilters,
 } from '../selectors/calendar-filter-selectors';
 import { threadInFilterList } from '../shared/thread-utils';
 import {
@@ -24,6 +25,8 @@
   defaultCalendarFilters,
   updateCalendarThreadFilter,
   clearCalendarThreadFilter,
+  updateCalendarCommunityFilter,
+  clearCalendarCommunityFilter,
   setCalendarDeletedFilter,
   calendarThreadFilterTypes,
 } from '../types/filter-types';
@@ -80,6 +83,17 @@
       // Adding NOT_DELETED filter
       return [...state, { type: calendarThreadFilterTypes.NOT_DELETED }];
     }
+  } else if (action.type === updateCalendarCommunityFilter) {
+    const otherFilters = nonCommunityCalendarFilters(state);
+    return [
+      ...otherFilters,
+      {
+        type: calendarThreadFilterTypes.COMMUNITY,
+        threadIDs: action.payload.threadIDs,
+      },
+    ];
+  } else if (action.type === clearCalendarCommunityFilter) {
+    return nonCommunityCalendarFilters(state);
   } else if (
     action.type === newThreadActionTypes.success ||
     action.type === joinThreadActionTypes.success ||
diff --git a/lib/selectors/calendar-filter-selectors.js b/lib/selectors/calendar-filter-selectors.js
--- a/lib/selectors/calendar-filter-selectors.js
+++ b/lib/selectors/calendar-filter-selectors.js
@@ -72,6 +72,19 @@
   nonExcludeDeletedCalendarFilters,
 );
 
+function nonCommunityCalendarFilters(
+  calendarFilters: $ReadOnlyArray<CalendarFilter>,
+): $ReadOnlyArray<CalendarFilter> {
+  return filterFilters(calendarFilters, calendarThreadFilterTypes.COMMUNITY);
+}
+
+const nonCommunityCalendarFiltersSelector: (
+  state: BaseAppState<*>,
+) => $ReadOnlyArray<CalendarFilter> = createSelector(
+  (state: BaseAppState<*>) => state.calendarFilters,
+  nonCommunityCalendarFilters,
+);
+
 function filterExists(
   calendarFilters: $ReadOnlyArray<CalendarFilter>,
   filterType: CalendarThreadFilterType,
@@ -99,6 +112,8 @@
   nonThreadCalendarFiltersSelector,
   nonExcludeDeletedCalendarFilters,
   nonExcludeDeletedCalendarFiltersSelector,
+  nonCommunityCalendarFilters,
+  nonCommunityCalendarFiltersSelector,
   filterExists,
   includeDeletedSelector,
 };