Ubuntu :: How To Save Cron Job In Nano Text Editor

I've looked at tutorials but can't find out how to save a cron job in nano text editor.

I open crontab with

Quote:

crontab -e

The cron job I want to save is

Quote:

wget --output-document=dwr_$(date +\%Y\%m\%d\%H\%M).gif http://imd.gov.in/section/dwr/img/caz_chn.gif

So now I've got this in nano text editor

Quote:

# m h dom mon dow command
wget --output-document=dwr_$(date +\%Y\%m\%d\%H\%M).gif http://imd.gov.in/section/dwr/img/caz_chn.gif

What exactly do I do now to save the cron job? File doesn't have a Save As option,;just Open Terminal, Open Tab and New Profile.