How to export a class in a PowerShell v5 module

I've got a module setup to be like a library for a few other scripts. I can't figure out how to get a class declaration into the script scope calling Import-Module. I tried to arrange Export-Module with a -class argument, like the -function, but there isn't a -class available. Do I just have to declare the class in every script?

The setup:

• holidays.psm1 in ~\documents\windows\powershell\modules\holidays\
• active script calls import-module holidays
• there is another function in holidays.psm1 that returns a class object correctly, but I don't know how to create new members of the class from the active script after importing

Here is what the class looks like:

Class data_block
{
    $array
    $rows
    $cols
    data_block($a, $r, $c)
    {
        $this.array = $a
        $this.rows = $r
        $this.cols = $c
    }
}

According to here and here, you can use classes defined in your module by doing the following in PowerShell 5:

using module holidays