Why are all of these announced on the same day? Is there some special date comming up or what?
https://blog.auditanalytics.com/when-does-a-companys-year-en...
Executives can finalize things a bit more easily when folks out of the office as the day to day a bit slower. HR / Acctg / IT also usually like doing a one off project in these spots - usually a smaller group is in loop on these things.
The week between Christmas and New Years for the quiet meetings and week after for plans to be finished up.