diff --git a/doc/manual/source/time-series.rst b/doc/manual/source/time-series.rst
index 2af0796869b11735d1f65e43e3f97788eea6fea4..fd61cbca3d407e55863e2523a6021b53d0f38d15 100644
--- a/doc/manual/source/time-series.rst
+++ b/doc/manual/source/time-series.rst
@@ -31,10 +31,15 @@ Dynare understands dates in a mod file. Users can declare annual, bi-annual,
 quarterly, or monthly dates using the following syntax::
 
     1990Y
+    1990A
     1990S2
+    1990H2
     1990Q4
     1990M11
 
+Note that there are two syntaxes for annual dates (`1990A` is equivalent to
+`1990Y`), and for bi-annual dates (`1990H2` is equivalent to `1990S2`).
+
 Behind the scene, Dynare’s preprocessor translates these expressions
 into instantiations of the MATLAB/Octave’s class ``dates`` described
 below. Basic operations can be performed on dates: