Just realised that it only works after midnight.

A bit more detail, it's a sheet that holds average system availability times for various clients. These systems go down overnight for backups, reporting, stock takes blah blah. Then need to be back up before 6am.
What I what is to open the sheet and it to show me what clients systems are usually available at the current time, hence the 'Available?', it's really just something to do as it can get quite boring here, lol.

Ryan