It seems you might be referring to a specific collection of articles or a retrospective from December 2021. While "Series 122021" isn't a single official title for a show or book, December 2021 was a massive month for year-end reviews across media and politics.

Are you referring to a specific or blog sequence ?

Many critics finalized their "Best of" lists in December 2021, highlighting a year where streaming dominated.

: While published in July, Vladimir Putin's essay "On the Historical Unity of Russians and Ukrainians" remained a core piece of political "series" reading and debate through late 2021. 📊 Economic & Professional Reviews

Here is a write-up of the most significant "series" of events and releases from that specific timeframe: 📺 The Best of 2021 TV

💡 : If you are looking for a specific financial series or a creative writing collection numbered "122021," it may be a private or niche internal reference.

: A major talking point that concluded its high-stakes season in December 2021.

: December is peak "Performance Review" season. Many professional series focus on how executive assistants and managers can leverage these talks for career growth.