>Hi everybody,
>
>Given 52 weeks in a year and week definition (from Sat through Friday) I need to calculate Week's first day, week's last day and some other dates for the given year for each week. What would be a formula here?
>
>Thanks a lot in advance.

Eh,
i don't know exactly what you mean, but all the mondays of a year for example gives something like this.

dDate = firstmonday (with the day() function you can find it)
DO WHILE year(dDate) = year(dDate + x)
  ? dDate + 7
  x = x + 7
ENDDO