Moved 2023-12-13, 2023-12-20 to past

docs/staff-meeting.md

@@ -91,8 +91,6 @@ of a special topic, which will be announced in advance.
 
 ### Upcoming Meetings
 
--   2023-12-13 - HTCSS (Todd Tannenbaum)
--   2023-12-20 - [Operations](https://docs.google.com/presentation/d/1vj_KqHCpDV4o3vdtlV-UMarH4xdKkHVTg6DErd7rGbc/) (Jeff Dost)
 -   2023-12-27 - Cancelled - Holiday
 -   2024-01-03 - Cancelled - Holiday
 -   2024-01-10 - **All-Staff Town Hall** (TBD)
@@ -107,6 +105,8 @@ of a special topic, which will be announced in advance.
 Past meetings are listed newest to oldest.
 Blank lines separate cycles of team presentations.
 
+-   2023-12-20 - [Operations](https://docs.google.com/presentation/d/1vj_KqHCpDV4o3vdtlV-UMarH4xdKkHVTg6DErd7rGbc/) (Jeff Dost)
+-   2023-12-13 - Special guest: James Clark on LIGO monitoring
 -   2023-12-06 - [Security](https://drive.google.com/file/d/1B0dhbHPy_0bSquwUvlY84t_LYzBy2UhD/) (Josh Drake)
 -   2023-11-29 - All-Staff Town Hall (NAIRR) - [Notes](https://docs.google.com/document/d/1JBo5NYIWMuYDn0VdmcJjvvbHO0CIeQphbx8TyXOD960/)
 -   2023-11-22 - Cancelled - Thanksgiving