ufff.... well, i can try, hehehe
but sorry if my english is not very good

well, first thing is, create a desktop widget in your desktop choosing it from the desktop settings and adding a new subprogram, or sub aplications, i dont know how it call it in english cuz i have it in spanish language, after that in the settings of the widget in the rigth side chose the option Add Cmd, in the title bar write the name as you like, i call it date but you can put another
in command copy the comand i posted before for the date and press save
now in the middle left side, go down and mark the "Hide Bg" and "Hide Click Bg", whit this you hide the default icon of the widget.

after that, (i do like this, but i dont know if is necesary do it) under of the squares we marked before there is 5 white squares whit the name of .png archives, i delete all this five and left it clear.
continue down after that and in comand title settings, the white square i delete also the name of the .png file, and in the button position, chose hidden
continue down and in command results Settings, i delete the name of the png file aslo, all in white, and beside you can chosse the place the letters apears, i chose botton rigth, and in results you can chose the font and the size of the letters.
continue down and in progress animation, delete the white square also and in frames use disabled.
now under that, in update Policy mark startup and click, and in interval chose one day.
now save it whit the top button of the rigth side and is finish
i think so i dont forget anything.