We've mentioned in the past that NCsoft plans to merge all four Tabula Rasa servers into one, before the final shutdown on February 28th. Their plan has changed somewhat, as only the three U.S. servers (Pegasus; Orion; Cassiopeia) will be merged into a consolidated server called Hydra.
NCsoft will perform a data capture on Monday, and it may take up to 48 hours beyond that before Hydra is active. NCsoft says, "This means that characters will appear to 'time warp' back to Monday at 12:01 AM on the new server. We do not recommend doing anything irreversible to your character after Monday's data capture, as we are not absolutely confirming the server merge at this time. We will release more details, as well as a final conformation of the server merge, early next week."
Tabula Rasa's European server, Centarus, is not being included in the server merge, and as such will have a separate 'sunset' event for European time zones.