There are two primary lists to which you can subscribe to be notified about seminars and other events at the Center. These are self-serve lists: you can sign on and sign off at will. The first is the particle theory events list found here:
https://lists.uchicago.edu/web/info/theory-seminar
The second is the Kadanoff Center events list found here:
https://lists.uchicago.edu/web/info/kadanoffcenter_events
There are many other talks and seminars of interest to particle theory members. Some useful places to look are found under friends and additional seminars.
There is also a Kadanoff Center student run journal club that usually covers a fun collection of topics each quarter, many of which are of interest to particle theory. You can subscribe here:
https://lists.uchicago.edu/web/info/cmt-hep-journalclub
The last mailing list is for our "theoretical recreation" get together every Friday afternoon. Feel free to zoom in and participate if you can't be there in person!