A Bash function that transforms a date string into Discord's Unix time format, and copies it. Requires xclip.

cpddate.sh

#!/usr/bin/env bash
# SPDX-License-Identifier: CC0-1.0
# SPDX-FileCopyrightText: 2021 nfitzen <https://github.com/nfitzen>

# A Bash function that transforms a date string into Discord's Unix time format, and copies it.
# Requires xclip. Place in ~/.bash_aliases or any other Bash source.

function cpddate () {
    if [ $# -eq 0 ]; then
        >&2 echo "Not enough arguments provided."
        return 1
    fi
    if [[ -n $2 && $2 != [tTdDfFR] ]]; then
        >&2 echo "Must use a valid Discord timestamp style."
        return 2
    fi
    string="$(date -d "$1" +'<t:%s')"
    if [ $# -ge 2 ]; then
        string="${string}:$2"
    fi
    string="${string}>"
    echo -n "$string" | xclip -selection clipboard
}