power-shell birthday HTML - powershell

Question

I am writing a script for “My Birthday is *** days away!” countdown and convert it to HTML as MyBirthday.html.
Idid this so far
function Date {
$Name = Read-Host "Please enter your name"
$BirthMonth = Read-Host "Please enter your Month of Birthday"
$BirthDay = Read-Host "Please enter your Day of Birthday"
$BirthYear = (Get-Date).Year
$NumberOfDays=(New-TimeSpan -End "$BirthYear/$BirthMonth/$BirthDay").Days
if ($NumberOfDays -eq 0) {
Write-Host "Happy Birthday $Name. Today is your Birthday! Yeah!"
}
else {
Write-Host "Hello $Name, there are $NumberOfDays days to your Birthday!"
}
}
Out-File Date > C:\Users\Desktop\Date.html

Answer 1

Ideally you want to keep everything as an object (in this case a DateTime object) as it's much easier to manipulate.
I would do it as follows - I've annotated with comments, but if you have any questions ask.
function Date ($Name,$BirthMonth,$BirthDay)
{
#Create a datetime object
$Date = Get-Date -day $BirthDay -month $BirthMonth -year ((Get-Date).Year)
#Check if the entered date is before today
if($Date -lt (Get-Date))
{
#If so add 1 year
$Date = $Date.AddYears(1)
}
$NumberOfDays = New-Timespan -Start (Get-Date) -End $date
if ($NumberOfDays.Days -eq 0)
{
$result = "Happy Birthday $Name. Today is your Birthday! Yeah!"
}
else
{
$result = "Hello $Name, there are $($NumberOfDays.Days) days to your Birthday!"
}
#Create an object to return (Objects are easier and more flexible to work with down the pipeline)
$return = New-Object PSObject -Property #{
'Days Remaining' = $result
}
#Return the object
$return
}
#User input outside of the function (makes the function re-usable)
$Name = Read-Host "Please enter your name"
$BirthMonth = Read-Host "Please enter your Month of Birthday"
$BirthDay = Read-Host "Please enter your Day of Birthday"
#Call the function, pass the input and pipe the output
Date $Name $BirthMonth $BirthDay | ConvertTo-HTML > C:\users\jacob\desktop\date.html
#Demonstration of the returned object
Date $Name $BirthMonth $BirthDay