diff --git a/matlab/@dynDate/colon.m b/matlab/@dynDate/colon.m
deleted file mode 100644
index d1c7138b7..000000000
--- a/matlab/@dynDate/colon.m
+++ /dev/null
@@ -1,126 +0,0 @@
-function sp = colon(a,b) % --*-- Unitary tests --*--
-
-%@info:
-%! @deftypefn {Function File} {@var{sp} =} colon (@var{a},@var{b})
-%! @anchor{@dynDate/colon}
-%! @sp 1
-%! Overloads the colon operator for the Dynare Dates class (@ref{dynDate}). Creates a @ref{dynDates} object.
-%! @sp 2
-%! @strong{Inputs}
-%! @sp 1
-%! @table @ @var
-%! @item a
-%! Dynare date object instantiated by @ref{dynDate}, initial date.
-%! @item b
-%! Dynare date object instantiated by @ref{dynDate}, last date.
-%! @end table
-%! @sp 1
-%! @strong{Outputs}
-%! @sp 1
-%! @table @ @var
-%! @item c
-%! Dynare Dates object instantiated by @ref{dynDates}.
-%! @end table
-%! @sp 2
-%! @strong{This function is called by:}
-%! @sp 2
-%! @strong{This function calls:}
-%! @ref{dynDates}, @ref{@@dynDates/setFreq}, @ref{@@dynDates/setTime}, @ref{@@dynDates/setSize}
-%!
-%! @end deftypefn
-%@eod:
-
-% Copyright (C) 2011-2013 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 <http://www.gnu.org/licenses/>.
-
-if nargin~=2
-    error('dynDate::colon: I need exactly two input arguments!')
-end
-
-if ~( isa(a,'dynDate') && isa(b,'dynDate'))
-    error(['dynDate::colon: Input arguments ' inputname(1) 'and ' inputname(2) ' have to be a dynDate objects!'])
-end
-
-if a.freq~=b.freq
-    error(['dynDate::colon: Input arguments ' inputname(1) 'and ' inputname(2) ' must have common frequency!'])
-end
-
-if a>b
-    error(['dynDate::colon: ' inputname(1) ' must precede ' inputname(2) '!' ])
-end
-
-sp = dynDates(a);
-n = b-a;
-for t=1:n
-    a = +a;
-    sp = sp.append(a);
-end
-
-%@test:1
-%$ % Define two dates
-%$ date_1 = '1950Q2';
-%$ date_2 = '1951Q4';
-%$
-%$ % Define expected results.
-%$ e.freq = 4;
-%$ e.time = [1950 2; 1950 3; 1950 4; 1951 1; 1951 2; 1951 3; 1951 4];
-%$
-%$ % Call the tested routine.
-%$ d1 = dynDate(date_1);
-%$ d2 = dynDate(date_2);
-%$ d3 = d1:d2;
-%$
-%$ % Check the results.
-%$ t(1) = dyn_assert(d3.time,e.time);
-%$ t(2) = dyn_assert(d3.freq,e.freq);
-%$ T = all(t);
-%@eof:1
-
-%@test:2
-%$ % Create an empty dynDate object
-%$ date = dynDate();
-%$
-%$ % Define expected results.
-%$ e.freq = 4;
-%$ e.time = [1950 2; 1950 3; 1950 4; 1951 1; 1951 2; 1951 3; 1951 4];
-%$
-%$ % Call the tested routine.
-%$ d = date('1950Q2'):date('1951Q4');
-%$
-%$ % Check the results.
-%$ t(1) = dyn_assert(d.time,e.time);
-%$ t(2) = dyn_assert(d.freq,e.freq);
-%$ T = all(t);
-%@eof:2
-
-%@test:3
-%$ % Create an empty dynDate object for quaterly data
-%$ qq = dynDate('Q');
-%$
-%$ % Define expected results.
-%$ e.freq = 4;
-%$ e.time = [1950 2; 1950 3; 1950 4; 1951 1; 1951 2; 1951 3; 1951 4];
-%$
-%$ % Call the tested routine.
-%$ d = qq(1950,2):qq(1951,4);
-%$
-%$ % Check the results.
-%$ t(1) = dyn_assert(d.time,e.time);
-%$ t(2) = dyn_assert(d.freq,e.freq);
-%$ T = all(t);
-%@eof:3
-