diff --git a/AUTHORS b/AUTHORS
index a662a342..2f988a43 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -58,3 +58,4 @@ suggestions:
   Bodo Graumann
   Lynoure
   Tim Ruffing
+  Andreas Poisel
diff --git a/ChangeLog b/ChangeLog
index 0ab2f36b..f09e20ca 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -70,7 +70,9 @@
           (thanks to Tim Ruffing)
 - TI-90   Let 'continue' accept a date or a date range
 - TI-91   Timewarrior does not compile on DragonFly
-          (thanks to Michael Neumann).
+          (thanks to Michael Neumann)
+- TI-100  :lastquarter throws exception in first quarter
+          (thanks to Andreas Poisel)
 - Fixed Python 3 support of the holiday/refresh script
           (thanks to Jelle van der Waa).
 - Added missing man page link
diff --git a/src/helper.cpp b/src/helper.cpp
index 9cc4e7ef..ee0c54cb 100644
--- a/src/helper.cpp
+++ b/src/helper.cpp
@@ -260,8 +260,13 @@ bool expandIntervalHint (
 
     m = ((q - 1) * 3) + 1;
 
-    range.start = Datetime (y, m,     1);
-    range.end   = Datetime (y, m + 3, 1);
+    range.start = Datetime (y, m, 1);
+
+    m += 3;
+    y += m/12;
+    m %= 12;
+
+    range.end   = Datetime (y, m, 1);
 
     debug (format ("Hint {1} expanded to {2} - {3}",
                    hint,