Retrieves the date and time of the last successful download.
[ lastDownload = ] object.LastDownloadTime
lastDownload Floating-point number that receives the last download date and time.
The property is read-only. The property has no default value.
The value of LastDownloadTime for the item might differ from the feed if the feed no longer contains the item, if the server responds to a conditional GET request, or if the feed item has not changed since the last time it was downloaded.