Prints the time in binary using emojis

emojitime.sh

#!/bin/sh -eu

# Edit to represent you timezone or comment out if you do not want to define this
YOUR_LOCATION="🇳🇴"

# If you cannot think of anything you could use these unicode characters to represent
# military time zones.
#
# https://en.wikipedia.org/wiki/List_of_military_time_zones
#
# 🅰 or Ⓐ = UTC+1
# 🅱 or Ⓑ = UTC+2
# 🅲 or Ⓒ = UTC+3
# 🅳 or Ⓓ = UTC+4
# 🅴 or Ⓔ = UTC+5
# 🅵 or Ⓕ = UTC+6
# 🅶 or Ⓖ = UTC+7
# 🅷 or Ⓗ = UTC+8
# 🅸 or Ⓘ = UTC+9
# 🅺 or Ⓚ = UTC+10
# 🅻 or Ⓛ = UTC+11
# 🅼 or Ⓜ = UTC+12
# 🅽 or Ⓝ = UTC−1
# 🅾 or Ⓞ = UTC−2
# 🅿 or Ⓟ = UTC−3
# 🆀 or Ⓠ = UTC−4
# 🆁 or Ⓡ = UTC−5
# 🆂 or Ⓢ = UTC−6
# 🆃 or Ⓣ = UTC−7
# 🆄 or Ⓤ = UTC−8
# 🆅 or Ⓥ = UTC−9
# 🆆 or Ⓦ = UTC−10
# 🆇 or Ⓧ = UTC−11
# 🆈 or Ⓨ = UTC−12
# 🆉 or Ⓩ = UTC

# Take first argument as time (as 24hr clock, e.g. 23:00) or use the current system's local time
if echo "${1:-}" | grep -q :; then
  CURRENT_TIME="$1"
  shift 1
else
  CURRENT_TIME="$(date '+%H:%M')"
fi

# Use additional arguments as $ON_STATE and $OFF_STATE emojis
ON_STATE="${1:-🔴}"
OFF_STATE="${2:-⚫️}"

# Fall back to $OFF_STATE if $YOUR_LOCATION is not defined
[ -z "${YOUR_LOCATION:-}" ] && YOUR_LOCATION="$OFF_STATE"

# Convert time to binary using emojis to display
to_binary_emojis() {
  echo "obase=2;$1" | bc | sed 's/^/00000/' | tail -c$2 | sed "s/1/$ON_STATE/g;s/0/$OFF_STATE/g"
}

# Print result
cat <<EOF
$YOUR_LOCATION$(to_binary_emojis "${CURRENT_TIME%:*}" 6)
$(to_binary_emojis "${CURRENT_TIME#*:}" 7)
EOF