There will be a 24-hour maintenance period when the new worlds are added, which will also allow for the implementation of the long-awaited data travel system, which will let you temporarily send your character over to another data centre, and play alongside people who are native there already...
the 24-hour period of server downtime is consistent with major updates of the past, such asFFXIVEndwalker's Patch 6.0. If the start time is the same as it was for 6.0 as well, fans can expect the maintenance to start around 1:00 AM PT on April 11 and end at ...