Add these lines to .bash_profile to allow iterm2 to switch profiles with the time in the day.

gistfile1.sh

# Define a function that switches iterm profile
iterm2_profile() { echo -e "\033]50;SetProfile=$1\a"; }

# Change profile by $HOUR
# You'll need to change name of profiles to Light and Dark
HOUR=`date +"%H"`
if [ $HOUR -gt 6 ] && [ $HOUR -lt 18 ]; 
then iterm2_profile Light; 
else iterm2_profile Dark; 
fi

# Clear the Screen
clear