A PowerShell script to recursively zip all files that were last modified on or after the supplied start date.

New-LastModifiedZip.ps1

[CmdletBinding()]
Param(
    [Parameter(Mandatory = $true, HelpMessage = "This is the date used for filtering.")]
    [string]$StartDate
)

$ParsedDate = [System.DateTime]$StartDate
$CurrentPath = (Get-Item -Path ".\").FullName
$CurrentFolder = (Get-Item -Path ".\").Name
Get-ChildItem -Path . -Recurse -Attributes !D | Where-Object { 
    $_.LastWriteTime -ge $ParsedDate -and -not ($_.Name -eq "New-LastModifiedZip.ps1")
} | ForEach-Object {
    $thisFileName = $_.FullName.Replace("$CurrentPath\", "")
    Out-File -FilePath ".\$CurrentFolder.txt" -Append -Encoding ascii -InputObject $thisFileName
}

& "C:\Program Files\7-Zip\7z.exe" a -tzip -scsWIN "$CurrentFolder.zip" "`@$CurrentFolder.txt"