Never mind, I've figured it out.
For the curious, it was a matter of altering the "Waveform to Date Time String.vi" in the "Export Waveform to Spreadsheet.vi". All you need to do is stop it from concatenating the time string with the date string in that particular VI. I hope this helps some of my fellow newbies.
Sorry to waste the rest of your time.
Thanks,
Joe