NSUptime is a command-line program that calculates the amount of time a Notes server or client has been running, either on a local Notes server/client or on a remote Notes server.
Lotus Notes Client 4.6 or higher
If the time format setting on your local machine isn't the same as the time format setting on a remote server, you may get unexpected or incorrect results. I don't know of a good way of converting time format settings, because I don't know of a good way of finding out what the remote settings actually are.
Also, if you don't have remote console access to a remote server, you won't be able to retrieve its uptime. This is a Notes security issue.
download NSUptime (17KB)