A Powershell random generator for dates and times

RandomDateTimeGenerator.ps1

    function Get-RandomDateBetween{
        <#
        .EXAMPLE
        Get-RandomDateBetween -StartDate (Get-Date) -EndDate (Get-Date).AddDays(15)
        #>
        [Cmdletbinding()]
        param(
            [parameter(Mandatory=$True)][DateTime]$StartDate,
            [parameter(Mandatory=$True)][DateTime]$EndDate
            )

        process{
           return Get-Random -Minimum $StartDate.Ticks -Maximum $EndDate.Ticks | Get-Date -Format d
        }
    }

    
    function Get-RandomTimeBetween{
      <#
        .EXAMPLE
        Get-RandomTimeBetween -StartTime "08:30" -EndTime "16:30"
        #>
         [Cmdletbinding()]
        param(
            [parameter(Mandatory=$True)][string]$StartTime,
            [parameter(Mandatory=$True)][string]$EndTime
            )
        begin{
            $minuteTimeArray = @("00","15","30","45")
        }    
        process{
            $rangeHours = @($StartTime.Split(":")[0],$EndTime.Split(":")[0])
            $hourTime = Get-Random -Minimum $rangeHours[0] -Maximum $rangeHours[1]
            $minuteTime = "00"
            if($hourTime -ne $rangeHours[0] -and $hourTime -ne $rangeHours[1]){
                $minuteTime = Get-Random $minuteTimeArray
                return "${hourTime}:${minuteTime}"
            }
            elseif ($hourTime -eq $rangeHours[0]) { # hour is the same as the start time so we ensure the minute time is higher
                $minuteTime = $minuteTimeArray | ?{ [int]$_ -ge [int]$StartTime.Split(":")[1] } | Get-Random # Pick the next quarter
                #If there is no quarter available (eg 09:50) we jump to the next hour (10:00)
                return (.{If(-not $minuteTime){ "${[int]hourTime+1}:00" }else{ "${hourTime}:${minuteTime}" }})               
             
            }else { # hour is the same as the end time
                #By sorting the array, 00 will be pick if no close hour quarter is found
                $minuteTime = $minuteTimeArray | Sort-Object -Descending | ?{ [int]$_ -le [int]$EndTime.Split(":")[1] } | Get-Random
                return "${hourTime}:${minuteTime}"
            }
        }
    }