Here's one for the first Monday.

        cal 3 2000 | awk '/^ [0-9]/ {print $2;exit}'

explanation: get first line starting with a space and number
and print the second field and exit


On Mon, Sep 23, 2002 at 12:49:47PM +1000, Matthew Hannigan wrote:
> 
>       cal 3 2000 | awk 'NF >= 2 {m=$2} END {print m}'

for every line with at least 2 fields, set m
to the value of the second field.  at the end,
print the value of m 



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