update-time.sh

#!/bin/bash
# Automatically Updates System Time According to the NIST Atomic Clock in a Linux Environment
nistTime=$(curl -I --insecure 'https://nist.time.gov/' | grep "Date")
echo $nistTime
dateString=$(echo $nistTime | cut -d' ' -f2-7)
dayString=$(echo $nistTime | cut -d' ' -f2-2)
dateValue=$(echo $nistTime | cut -d' ' -f3-3)
monthValue=$(echo $nistTime | cut -d' ' -f4-4)
yearValue=$(echo $nistTime | cut -d' ' -f5-5)
timeValue=$(echo $nistTime | cut -d' ' -f6-6)
timeZoneValue=$(echo $nistTime | cut -d' ' -f7-7)
#echo $dateString
case $monthValue in
    "Jan")
        monthValue="01"
        ;;
    "Feb")
        monthValue="02"
        ;;
    "Mar")
        monthValue="03"
        ;;
    "Apr")
        monthValue="04"
        ;;
    "May")
        monthValue="05"
        ;;
    "Jun")
        monthValue="06"
        ;;
    "Jul")
        monthValue="07"
        ;;
    "Aug")
        monthValue="08"
        ;;
    "Sep")
        monthValue="09"
        ;;
    "Oct")
        monthValue="10"
        ;;
    "Nov")
        monthValue="11"
        ;;
    "Dec")
        monthValue="12"
        ;;
    *)
        continue
esac