Powershell - Determine Sunset and Add Time - powershell

Question

I have a Powershell script that determines my local sunrise and sunset. However, my end goal is to run a function at 45 minutes past sunset. I know I can't use AddMinutes(45) as that only works with Get-Date. I tried to format the output of the value returned for "sunset", but even formatted to match Get-Date, it still doesn't work. Is there some other method I could use?
$Daylight = (Invoke-RestMethod "https://api.sunrise-sunset.org/json?lat=35.608081&lng=-78.647666&formatted=0").results
$Sunrise = ($Daylight.Sunrise | Get-Date -Format "HH:mm")
$Sunset = ($Daylight.Sunset | Get-Date -Format "dddd, MMMM dd, yyyy hh:mm:ss tt")

Answer 1

If you're using PowerShell Core, the properties Sunrise and Sunset from the object returned by your API query should already be of the type DateTime, however in Windows PowerShell, you would need to cast [datetime] to them to convert them from string. Then .AddMinutes method would work without issues, if you're looking to run a function 45 minutes past Sunset you can try the following assuming this could be a scheduled task:
$Daylight = (Invoke-RestMethod "urlhere").results
$sunset = [datetime] $Daylight.sunset # => [datetime] only needed in Windows PowerShell
if([datetime]::Now -ge $sunset.AddMinutes(45)) {
# run function here
}
Or if you want your script to execute and wait until the right time, you can use a loop:
do {
Start-Sleep -Seconds 60
} until([datetime]::Now -ge $sunset.AddMinutes(45))
# run function here