diff --git a/icalBuddy.m b/icalBuddy.m
index a908d61..fcb7202 100644
--- a/icalBuddy.m
+++ b/icalBuddy.m
@@ -230,6 +230,7 @@ int main(int argc, char *argv[])
                @"-nrd        No relative dates\n"
                @"-npn        No property names\n"
                @"-n          Include only events from now on\n"
+               @"-oa         Only output all-day events\n"
                @"-sed        Show empty dates\n"
                @"-uid        Show event/task UIDs\n"
                @"-eed        Exclude end datetimes\n"
diff --git a/icalBuddy.pod b/icalBuddy.pod
index 86e9542..091ad04 100644
--- a/icalBuddy.pod
+++ b/icalBuddy.pod
@@ -132,6 +132,10 @@ Omit property names from the output (i.e. only show property values -- e.g. "My
 
 If the I<command> value C<eventsToday> is used, only output events that occur between the current time and the end of the day (as opposed to events that occur between the start and end of the day, as by default.)
 
+=item B<-oa>, B<--onlyAllDayEvents>
+
+Only output all-day events.
+
 =item B<-na>, B<--maxNumAttendees>
 
 Maximum number of attendees to show for events.
diff --git a/icalBuddyArgs.m b/icalBuddyArgs.m
index 0dfb3aa..269b2a6 100644
--- a/icalBuddyArgs.m
+++ b/icalBuddyArgs.m
@@ -77,6 +77,8 @@ void handleArgument(NSString *shortName, NSString *longName, id value,
             opts->alwaysShowTodaysSection = YES;
         else if ([shortName isEqualToString:@"ea"] || [longName isEqualToString:@"excludeAllDayEvents"])
             opts->excludeAllDayEvents = YES;
+        else if ([shortName isEqualToString:@"oa"] || [longName isEqualToString:@"onlyAllDayEvents"])
+            opts->onlyAllDayEvents = YES;
     }
 
     // value-requiring arguments
diff --git a/icalBuddyDefines.h b/icalBuddyDefines.h
index 108a93d..c5f4acd 100644
--- a/icalBuddyDefines.h
+++ b/icalBuddyDefines.h
@@ -144,6 +144,7 @@ typedef struct
     BOOL alwaysShowTodaysSection;
     BOOL specificCalFilterPrecedesCalTypeFilter;
     BOOL excludeAllDayEvents;
+    BOOL onlyAllDayEvents;
 
     BOOL output_is_uncompletedTasks;
     BOOL output_is_eventsToday;
@@ -171,7 +172,7 @@ typedef struct
     NSUInteger maxNumNoteCharacters;
 } AppOptions;
 
-#define NEW_DEFAULT_APP_OPTIONS {NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,\
+#define NEW_DEFAULT_APP_OPTIONS {NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,NO,\
                                  nil,nil,nil,nil,nil,nil,nil,nil,nil,nil,nil,nil,nil,0,0}
 
 
diff --git a/icalBuddyFunctions.m b/icalBuddyFunctions.m
index 27f140e..2948b4b 100644
--- a/icalBuddyFunctions.m
+++ b/icalBuddyFunctions.m
@@ -134,6 +134,9 @@ BOOL areWePrintingAlsoPastEvents(AppOptions *opts)
     if (opts->excludeAllDayEvents)
         ret = [ret filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"isAllDay == NO"]];
 
+    if (opts->onlyAllDayEvents)
+        ret = [ret filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"isAllDay == YES"]];
+
     return ret;
 }