Displays the time in various timezones on the xwindows background image

time_background.sh

#!/bin/bash

export PATH=/bin:/usr/bin
DISPLAY=":0.0"
FONT=Courier-10-Pitch
FORMAT="%Z (UTC%z) %a %b %e %H:%M"
SIZE=$(
    xwininfo -display "$DISPLAY" -root \
    | awk '/Width:/{width=$2}; /Height:/{height=$2} END { print width"x"height }'
)

LABEL=$(
    TZ=America/Los_Angeles date +"$FORMAT"
    TZ=America/Chicago date +"$FORMAT"
    TZ=America/New_York date +"$FORMAT"
    TZ=UTC date +"$FORMAT"
    TZ=EET date +"$FORMAT"
)

convert \
    -size "$SIZE" \
    -background black \
    -fill lightgray \
    -font $FONT \
    -gravity southwest \
    -pointsize 22 \
    label:"$LABEL" \
    jpg:- \
| xloadimage -display "$DISPLAY" -onroot stdin