[macNchz]

I wind up making lots of interim files when importing/exporting/munging/analyzing data–to help keep track of these things (CSVs, scripts and miscellany that I may or may not want to revisit in the future) I have a function I call today to auto-create daily scratch directories:

    TODAY_DIR="$HOME/today/"
    DATE_DIR=$(date +'%Y-%m-%d')
    
    if [ ! -d  $TODAY_DIR$DATE_DIR ];
    then
        mkdir -p $TODAY_DIR$DATE_DIR
    fi;
    
    echo $TODAY_DIR$DATE_DIR

So you can do stuff like this with less thinking/typing:

    cp somefile.csv $(today)

I've been using this for a few years and continually find it handy, both at the command line and in keeping files clustered when I want to dig something up later. It is slightly less helpful if you regularly work past midnight, though!