Find the next business day from JSON while loop in PowerShell - json

Question

I found a nice little JSON API from Kayaposoft which will give a true/false value if the given day is a work day or not (e.g. Sunday the 14th of April; isWorkDay: false). This API is also able to honor our local holidays, like Vappu in Finland, etc.
So, as I try to script this in PowerShell (being the beginner that I am), I quickly realized a problem with the code below. While the code works, it isn't very practical and is dependent on each variable twice (once to set it up and once in the loop).
Is there any way to beautify this code? Can it be made to be more practical and/or to not use each variable twice?
$date = (Get-Date).AddDays(11)
$jsonDate = $date.ToString('dd-MM-yyyy')
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
$jsonRequest = Invoke-WebRequest "https://kayaposoft.com/enrico/json/v2.0/?action=isWorkDay&date=$jsonDate&country=fin" | ConvertFrom-Json
while ($jsonRequest.isWorkDay -ne $true) {
$date = $date.AddDays(1)
$jsonDate = $date.ToString('dd-MM-yyyy')
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
$jsonRequest = Invoke-WebRequest "https://kayaposoft.com/enrico/json/v2.0/?action=isWorkDay&date=$jsonDate&country=fin" | ConvertFrom-Json
Write-Host $jsonDate
Write-Host $jsonRequest
}
Results:
22-04-2019
#{isWorkDay=False}
23-04-2019
#{isWorkDay=True}

Answer 1

Something like this:
$date = (Get-Date)
# not sure if you really need this ?!?
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
# do { ... } while (...) - execute at least once
do {
$jsonDate = $date.ToString('dd-MM-yyyy')
$jsonRequest = Invoke-WebRequest "https://kayaposoft.com/enrico/json/v2.0/?action=isWorkDay&date=$jsonDate&country=fin" | ConvertFrom-Json
$date = $date.AddDays(1)
Write-Host $jsonRequest
Write-Host $jsonDate
}
while ($jsonRequest.isWorkDay -ne $true)