Timeline Explorer is a free, feature-rich Excel replacement that's catered specifically for digital forensic examinations. There are a handful of quality of life features over Excel that are worth considering for any examiners who live in Excel/CSV output when conducting analysis.

Timeline Explorer automatically places your timestamps in the yyyy-mm-ss hh:mm:ss format! How convenient! If that timestamp format isn't to your liking, you can change it in Tools -> Datetime Format.