There are 3 different source for the dates.

Source 1 is the Winter Updates schedule they revealed.
Source 2 is the dates on the new character silhouette art contest.
Source 3 are the dates from not yet completed “Coming Soon” page

(Source) Date Detail
(s3)11/20 Thr Coming Soon “Star and Chains”
(s3)11/27 Thr Coming Soon “Person and Chains”
(s2)12/01 Mon ???
(s2)12/09 Tus ???
(s3)12/11 Thr Coming Soon “???”
(s2)12/11 Thr ???
(s2)12/12 Fri ???
(s2)12/18 Thr ???
(s1)12/18 Thr Base job
(s1)12/30 Tus Guild System Revamp
(s1)01/15 Thr 1st job
(s1)01/22 Thr New dungeons
(s1)02/05 Thr New dungeons
(s1)02/12 Thr 2nd job

Fill in the ???s

Personal Guess:

Source 1 is the Winter Updates schedule they revealed.
Source 2: Factual information about the new character
Source 3: Snippets of New character’s story/background

(Source) Date Detail
(s3)11/20 Thr Coming Soon “Star and Chains”
(s3)11/27 Thr Coming Soon “Person and Chains”
(s2)12/01 Mon Reveal New Character info (Name, Weapon/power, Voice…etc)
(s2)12/09 Tus KR offline PvP tournament finals date. New Character Teaser or Trailer in the event.
(s3)12/11 Thr Coming Soon “Another Teaser regarding new character’s story”
(s2)12/11 Thr Coincides with Above.
(s2)12/12 Fri Reveal New Character info(Name, Weapon/power, Voice…etc)
(s2)12/18 Thr New character Release.
(s1)12/18 Thr Base job release
the “coming soon” teasers start to portray new character’s job change stories
(s1)12/30 Tus Guild System Revamp
(s1)01/15 Thr 1st job release
(s1)01/22 Thr New dungeons
(s1)02/05 Thr New dungeons
(s1)02/12 Thr 2nd job release