Quick timezone chart

wtftz.sh

#!/bin/bash
WANT=$1

dotime () {
    WANT=$1
    PAC=`TZ='America/Vancouver' date +%H:%M -d "TZ=\"America/Montreal\" $WANT"`
    MTN=`TZ='America/Denver'    date +%H:%M -d "TZ=\"America/Montreal\" $WANT"`
    CEN=`TZ='America/Chicago'   date +%H:%M -d "TZ=\"America/Montreal\" $WANT"`
    UTC=`TZ='Etc/UTC'           date +%H:%M -d "TZ=\"America/Montreal\" $WANT"`
    CST=`TZ='Asia/Shanghai'     date +%H:%M -d "TZ=\"America/Montreal\" $WANT"`
    SYD=`TZ='Australia/Sydney'  date +%H:%M -d "TZ=\"America/Montreal\" $WANT"`

    echo -e "$WANT\t\t$PAC\t$MTN\t$CEN\t\t$UTC\t$CST\t$SYD"
}

echo -e "Eastern\t\tPacific\tMountn\tCentral\t\tUTC\tChina\tSydney"
if [ -z "$WANT" ]; then
    for HOUR in `seq 0 23`; do
        dotime `printf %02d $HOUR`:00
    done
elif [ "$WANT" = "now" ]; then
    dotime `date +%H:%M`
else
    dotime $WANT
fi