Date in skecth

Hi,

I need to write the date    /MM/YY in a sketch in Creo Parametric 2.0.

I use the Text tool.

I need to update automatically this date every time that i open the file.

I know... I can use a parameter from the model parameter list, but i don´t know how to create a parameter with the actual date and always update it.

Anyone knows how to do this?

Thanks.