datevec=[1992 1 5 0 0 0];
idm_source_path=('/hao/aim2/dmsp/dmsp_idm_4s/');

yrstr= num2str(datevec(1));
yearstring = yrstr(3:4);

if datevec(2) < 10;
    idm_folderMo = strcat('0',num2str(datevec(2)));
else
    idm_folderMo = strcat(num2str(datevec(2)));
end
idm_folder = strcat(yearstring,idm_folderMo,'/')
idm_source_path = strcat(idm_source_path,idm_folder)