When does the Alpha Test end?

[Felis]

Extension of 3 and introduction of 4 have the soul purpose of "stop people from crying." As KiriA500 said they have what they needed from the alpha...

Read the letter
Phase 3: 24/7 testing
Phase 4: server merge testing
After phase 4: alpha going down or still on

The Alpha Test went global in phase 3, with the servers being online 24 hours a day for the purpose of age testing. Ahead of this phase, alpha tester acceptance mails were sent to regions outside of Japan.

A world merge test is scheduled for the soon-to-commence Phase 4, after which the Alpha Test will come to a close around mid-December. But if the demand is there, we’ll consider leaving the alpha worlds online until the end of the year. (Though we can’t really call it an alpha test anymore.)