I'm trying to display the date, under the days of the week.
But instead of starting with sun and going thru sat.
I'm setting the spread sheet up for a Fri, Sat, and Sun only.
One way ..
For filling across, starting with a Friday, say 3 Mar 2006:
Put in say, B2:
=DATE(2006,3,3)+COLUMNS($A:A)-1+INT((COLUMNS($A:A)-1)/3)*4
Format B2 as date to taste, then copy B2 across as far as required
B2

2 returns 3 Mar - 5 Mar 2006 (Fri - Sun),
E2:G2 returns 10 Mar - 12 Mar 2006 (Fri - Sun)
and so on across
To fill down, starting with a Friday, say 3 Mar 2006:
Put in say, A3:
=DATE(2006,3,3)+ROWS($A$1:A1)-1+INT((ROWS($A$1:A1)-1)/3)*4
Copy A3 down as far as required
A3:A5 returns 3 Mar - 5 Mar 2006 (Fri - Sun),
A6:A8 returns 10 Mar - 12 Mar 2006 (Fri - Sun)
and so on down
The above expression is similar to that for filling across,
except that ROWS replaces COLUMNS as the incrementer
DATE(2006,3,3) = 3 Mar 2006 (a Friday)
[ DATE(year,month,day) ]
Adapt the starting date to suit ..