Start time and End time using VBA

Hi everyone,

I need your help regarding this spreadsheet format. On row 2, there are Start and End, I would like this to be created in VBA which when you click the start button, it will automatically logged the date and time ex. 3/18/2015 9:55 am format. and when you click stop it will logged the date and time as well.

Your help are greatly appreciated.

Thank you