Discord time

ConvertTo-DiscordTime.ps1

function ConvertTo-DiscordTime {
    <#
    .SYNOPSIS
    Converts a DateTime to a Discord formatted timestamp.

    ShortTime => 21:38
    MediumTime => 21:38:23
    ShortDate => 12/21/25
    LongDate => December 21, 2025
    LongDateShortTime => December 21, 2025 at 21:38
    FullDateShortTime => Sunday, December 21, 2025 at 21:38
    ShortDateShortTime => 12/21/25, 21:38
    ShortDateMediumTime => 12/21/25, 21:38:23
    Relative => 3 minutes ago

    .NOTES
    format:
    <t:UnixTimeSecond:R>
    e.g.
    <t:1766069340:R>

    .EXAMPLE
    'ShortTime', 'MediumTime', 'ShortDate', 'LongDate', 'LongDateShortTime', 'FullDateShortTime', 'ShortDateShortTime', 'ShortDateMediumTime', 'Relative' | ForEach-Object {
        '{0} => {1}' -f $_, (ConvertTo-DiscordTime (Get-Date) $_)
    }
    .LINK
    https://discord.com/developers/docs/reference#message-formatting-timestamp-styles
    #>
    [CmdletBinding()]
    [Alias('To-DiscordTime', 'DiscordTime')]
    param(
        [Parameter(Mandatory, ValueFromPipeline, ValueFromPipelineByPropertyName)]
        [Alias('Date')]
        [DateTime] $DateTime,
        [Parameter(ValueFromPipelineByPropertyName)]
        [ValidateSet('ShortTime', 'MediumTime', 'ShortDate', 'LongDate', 'LongDateShortTime', 'FullDateShortTime', 'ShortDateShortTime', 'ShortDateMediumTime', 'Relative')]
        [String] $Format = 'FullDateShortTime'
    )
    begin {
        $ht = @{
            ShortTime           = 't'
            MediumTime          = 'T'
            ShortDate           = 'd'
            LongDate            = 'D'
            LongDateShortTime   = 'f'
            FullDateShortTime   = 'F'
            ShortDateShortTime  = 's'
            ShortDateMediumTime = 'S'
            Relative            = 'R'
        }
    }
    process {
        $DTOffset = [DateTimeOffset]$DateTime
        '<t:{0}:{1}>' -f $DTOffset.ToUnixTimeSeconds(), $ht[$Format]
    }
}

This is awesome, thanks @trackd