diff --git a/matlab/@dynDates/lt.m b/matlab/@dynDates/lt.m
new file mode 100644
index 000000000..81c79cb50
--- /dev/null
+++ b/matlab/@dynDates/lt.m
@@ -0,0 +1,84 @@
+function C = lt(A,B)
+
+% Overloads the < operator for dynDates objects.
+%
+% INPUTS
+% o A dynDates object with n or 1 elements.
+% o B dynDates object with n or 1 elements.
+%
+% OUTPUTS
+% o C column vector of max(n,1) elements (zeros or ones).
+
+% Copyright (C) 2013 Dynare Team
+%
+% This file is part of Dynare.
+%
+% Dynare is free software: you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation, either version 3 of the License, or
+% (at your option) any later version.
+%
+% Dynare is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with Dynare. If not, see .
+
+if ~isequal(nargin,2)
+ error('dynDates::lt: I need exactly two input arguments!')
+end
+
+if ~isa(A,'dynDates') || ~isa(B,'dynDates')
+ error(['dynDates::lt: Input arguments ''' inputname(1) ''' and ''' inputname(2) ''' have to be a dynDates objects!'])
+end
+
+if ~isequal(A.freq,B.freq)
+ C = 0;
+ return
+end
+
+if isequal(A.ndat, B.ndat)
+ C = NaN(A.ndat,1);
+ for i=1:A.ndat
+ C(i) = compare_vectors(@lt, A.time(i,:), B.time(i,:));
+ end
+else
+ if isequal(A.ndat,1) && isequal(B.ndat,1)
+ C = compare_vectors(@lt, A.time, B.time);
+ elseif isequal(A.ndat,1)
+ C = NaN(B.ndat,1);
+ for i=1:B.ndat
+ C(i) = compare_vectors(@lt, A.time, B.time(i,:));
+ end
+ elseif isequal(B.ndat,1)
+ C = NaN(A.ndat,1);
+ for i=1:A.ndat
+ C(i) = compare_vectors(@lt, A.time(i,:), B.time);
+ end
+ else
+ C = 0;
+ end
+end
+
+%@test:1
+%$ % Define some dates
+%$ B1 = '1945Q1';
+%$ B2 = '1945Q2';
+%$ B3 = '1945Q3';
+%$ B4 = '1945Q4';
+%$ B5 = '1950Q1';
+%$
+%$ % Create dynDates objects.
+%$ dd = dynDates(B1,B2,B3,B4);
+%$
+%$ % Check the results.
+%$ t(1) = dyn_assert(dynDates(B1)