diff --git a/backend/src/main/java/uk/co/neviyn/Observations/dao/ObservationDao.java b/backend/src/main/java/uk/co/neviyn/Observations/dao/ObservationDao.java
index 3d4b40b..23d68c6 100644
--- a/backend/src/main/java/uk/co/neviyn/Observations/dao/ObservationDao.java
+++ b/backend/src/main/java/uk/co/neviyn/Observations/dao/ObservationDao.java
@@ -50,4 +50,10 @@ public interface ObservationDao {
       "AVG(teamwork) as teamwork, AVG(knowledge) as knowledge, date FROM observations GROUP BY date ORDER BY date")
   @RegisterRowMapper(AverageStats.Mapper.class)
   List<AverageStats> averageObservationScoresByDay();
+
+  @SqlQuery("SELECT MIN(date) FROM observations")
+  DateTime earliestEntryDate();
+
+  @SqlQuery("SELECT MAX(date) FROM observations")
+  DateTime latestEntryDate();
 }