Some date functions - just date no time, last day of month, first day of month, first day of week and last day of week

Hi,
I found one article which will fulfill my requirement to perform date operation.
Here I post that link. I hopes it will also help you

http://sqlblogcasts.com/blogs/simons/archive/2008/10/28/Some-date-functions---just-date-no-time--last-day-of-month--first-day-of-month--first-day-of-week-and-last-day-of-week.aspx