How to get last and first date

Hi All;

I have two fields called Goal Start Date and Goal End Date

These two fields have various date for e.g Goal Start Date has dates like 01.01.2013, 01.02.2013,..............01.12.2015

Similarly goal end date have dates like 31.12.2013,31.01.2014..................31.12.2015

So from these date i need to display goal Start date as 1st date for e.g 01.01.2013 and Goal end date need to display the last date as 31.12.2015

Any help much appreciated

Thanks

Pradnya

Pradnya07