programmersday.ps1

using namespace System.Windows
using namespace System.Windows.Forms
using namespace System.Drawing
Set-Alias -Name load -Value 'Add-Type'
Set-Alias -Name new -Value New-Object
load -assembly System.Windows.Forms
load -assembly System.Drawing
$a = new Form
$b = new Label
$c = new Label
$b.Font = new Font('Arial',14)
$c.Font = new Font('Segoe UI Emoji',16)
$b.Location = new Size(16,16)
$a.Size = '402,138'
$a.Text = "Today is your day!"
$b.Text = "Happy International Programmers' Day!!!"
$c.Text = "🎉"
$b.AutoSize = $true
$c.AutoSize = $true
$c.Location = new Size($(($a.Size.Width/2)-26),52)
$a.Controls.AddRange(@($b,$c))
[void]$a.ShowDialog()

Compiled version:
happy_programmers_day.exe
(click the link, do ctrl+s and rename the file extension to .exe)