Get UTC Time From Internet

get_utc.sh

#!/bin/bash

# get UTC date
date -u -d "$(curl -sI google.com | grep -i '^date:' | cut -d' ' -f2-)"

# get local date from UTC
date -d "$(curl -sI google.com| grep -i '^date:'|cut -d' ' -f2-)"

# sync local date from UTC
sudo date -s "$(date -d "$(curl -sI google.com | grep -i '^date:' | cut -d' ' -f2-)" '+%Y-%m-%d %H:%M:%S')"

# UTC vs local
 date -d "$(curl -sI google.com| grep -i '^date:'|cut -d' ' -f2-)" && date
 date -u -d "$(curl -sI google.com| grep -i '^date:'|cut -d' ' -f2-)" && date -u