The series of events which culminated in the firing of Monica Cellio is so exceptional in the history of Stack Exchange, it makes sense that a special tag is needed in order to keep track of the ever increasing number of related posts.
At the beginning, the tags: code-of-conduct and moderator appeared to be sufficient to cover the task, many users were hopeful that management would open a private conversation with Monica, which would lead to her reinstatement. On October 15th, Shog9♦ reassured the community that a solution was within sight; a new process was being formulated by the team, “that'll give Monica a fair shake” that would finally restore her diamonds. But on October 22, the dismissed moderator refused to enter the new reinstatement process, arguing that “The process starts from a presumption of guilt”.
Seven weeks later, there is no sign of the saga ending, Monica Cellio appears to have initiated legal proceedings against Stack Exchange, and management has refused to respond to her repeated requests for dialogue. The conflict continues.
Hence my suggestion, conflict-2019
Conflict because Meta Stack Exchange has been a battleground; employers and volunteers are in litigation; not all users have seen eye to eye, a significant number of Stack Overflow users have expressed serious reservations about the relicensing and audio/fingerprinting issues. Non-native and native speakers have expressed perplexity and concerns over pronouns such as the singular they. Meanwhile the management continues to observe the fighting behind enemy lines.
Volunteers: LGBTQ+ community and long-standing SE members; disillusioned and frustrated SO users; resigned and reinstated mods; suspended users, and diamond moderators; and last but not least, one defamed person. There has been considerable conflict in the last seven weeks with some valiant attempts at pacification but with little to no success.
Lexico defines conflict as
1.0 A serious disagreement or argument, typically a protracted one.
1.3 A serious incompatibility between two or more opinions, principles, or interests.
The year 2019 is self explanatory but if this conflict should continue into the New Year, the tag can be easily modified to: conflict-2019-20
I am aware, and sad, that the tag is pessimistic but how do you put a positive spin on what's been happening?