function days = month_length_synodic ( y, m )

%*****************************************************************************80
%
%% month_length_synodic() returns the mean synodic month length.
%
%  Discussion:
%
%    The synodic month is the time from one new moon to the next, that is,
%    when the moon and Sun are in conjunction.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    22 July 2012
%
%  Author:
%
%    John Burkardt
%
%  Input:
%
%    integer Y, the year.
%
%    integer M, the month.
%
%  Output:
%
%    real DAYS, the number of days in the month.
%
  month_length_synodic = 29.530588853;

  return
end
