I had a little problem with my Raspberry Pi Raspbian Wheezy and with Kali-Linux when I wanted to do some wardriving
and wanted to have right time/date on my Pi and I didn’t have anykind of Internet connection.

You could get right time from the GPS but I didn’t get it to work with NTP and my GPS receiver
but I found a nice script that get’s me around that problem:

date -s '01/01/2014 00:01'
sleep 1
pkill ntpd
pkill gpsd
gpsd -b -n -D 2 /dev/ttyUSB0
sleep 2
GPSDATE=`gpspipe -w | head -10 | grep TPV | sed -r 's/.*"time":"([^"]*)".*/\1/' | head -1`
echo $GPSDATE
date -s "$GPSDATE"
/usr/sbin/ntpd

As far as I know this sets your Pi time to GMT but if that is not your local time then you can add this:

FIDATE=`date --date='+3 hour'`
echo $FIDATE
date -s "$FIDATE"
sleep 1

This one correct time to be my local (Finnish) time which is +3 hours from that GMT which you get from GPS.

Continue reading Raspberry Pi: Set time from GPS dongle