Excel 2010:  Date Cell Automation

Hello Experts!

    I'm curious if any one has (or can point me to) a formula or some .vba that I can use that automate the following process:  I'd like it to do an Alt+Enter in ONE cell that contains dates that are vertical of one another and then add the present date (mm/dd/yyyy) at the bottom.  It can be int he form of a button, you click and it does this or as soon as you click into the cell e.g.
 
  Column K
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* 7/1/2015                                                     *
* 7/2/2015                                                     *
* 7/3/2015                                                     *
* 7/4/2015                                                     *
* 7/5/2015                                                     *
* 7/28/2015 <--present date added          *       <-----ONE Cell, let's call this K2 as an example.
***********************************


Any help is GREATLY appreciated!  Thank you.