Re: date/getdate.y: Relative days

[Colin S. Miller]

Akim Demaille wrote:
> I'm trying to find a means, given a week number, to find the date of
> the Monday and Friday.  I was wondering if I could use GNU date to do
> that straightforwardly instead of having to program this.

Akim,

%u (numerical-day-of-week) is useful here

This should work


DATE="10 august 2007"  # a random date
OFFSET=$(( $(date --date="${DATE}" +%u ) - 1))
date --date="$DATE $OFFSET days ago"

HTH,
Colin S. Miller



BTW,
The first week (before the week's start day),
can be week 0 in some systems.