Time to some 'at' event

#!/bin/bash

# timeToEvent

# Time to some 'at' event in HH:MM:SS

# Now time
now="$(date +%s)"

# function, $1 = at job number
timeToEvent() {
    # job Event time
    event="$(atq | grep ^"$1" | cut -d' ' -f 2-6)" # cut instead of awk?
    if [[ "$event" ]]; then

        event="$(date -d "$event" +%s)"
        diff=$(( event - now ))

        # And show as HH:MM:SS, only if less than 24 hours
        # 24 hours is 86400 seconds
        if (( diff < 86400 )); then
            date -u -d @${diff} +%T
        fi
    fi
}

job="480" # example
timeToEvent "$job"