DBUSERNAME="***"
DBPASS="****"
BACKUPDIR="/path/<folder_name>/"
TODAY=`date +"%A"`
#enter database names here
DBs=( database_name )

#if backupdirectory doesn't exist, create it
if [ ! -d "$BACKUPDIR" ]; then
    mkdir -p "$BACKUPDIR"
fi
for database in "${DBs[@]}"; do
    #concate directory path, today's day and dbname with .sql ext
    filename=$BACKUPDIR${database}_${TODAY}.sql
    #take dump
    mysqldump -u$DBUSERNAME -p$DBPASS $database > $filename
    #compress it
    gzip -f $filename
done