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#!/bin/sh
if [ -z "$1" ]; then
echo "Usage: ${0##*/} <date-string>"
echo " Example: ${0##*/} 'tomorrow 06:00'"
exit 2
fi
set -e
# Calculate the seconds until the given date
secsUntil=$(expr "$(date +%s -d "$*")" - "$(date +%s)")
# Calculate minutes and hours
minutesUntil=$(echo "scale=1; $secsUntil/60" | bc)
hoursUntil=$(echo "scale=2; $secsUntil/3600" | bc)
# Get the formatted date
date=$(date -d "$*")
# Display the result
echo "$hoursUntil hours (or $minutesUntil mins) until $date"
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