How to insert date in file name while copying multiple files using powershell

Question

I'm trying to insert today's date in file name which i'm coping from one location to another location.

Here is the copy script (Working),

$RemotePath = "E:\Test\AB"

$LocalPath = "E:\Test\CD"

$Max_days = "-1"

$Curr_date = get-date

Foreach($file in (Get-ChildItem $RemotePath))

{

if($file.LastWriteTime -gt ($Curr_date).adddays($Max_days))

{

    Copy-Item -Path $file.fullname -Destination $LocalPath 

    #Move-Item -Path $file.fullname -Destination $LocalPath

}

ELSE

{

   "not copying $file"

}

}

I need to add today's date in YYYYMMDD format to all files which i'm copying from $RemotePath to $LocalPath

Example, 1_20210715.txt

Could anyone please help me on this.