Update README.md

README.md

@@ -11,7 +11,7 @@ This session will cover
 We will also briefly walk through how to apply for an XCAMS account, so that you
 can show your non-ORNL colleagues how to sign up.
 
-## What is a Merge Request?
+## Dec 22: What is a Merge Request?
 **Thursday 12/22, 9:00am in JICS Auditorium (5100 RM 128)**
 
 Merge Requests are the core of collaboration in Gitlab. In this session, we'll 
@@ -19,7 +19,7 @@ walk through creating a merge request for a shared project, and we'll talk about
 some of the issue that come up in accepting and vetting merge requests from
 external collaborators
 
-## Branches for Fun and Profit
+## Dec 29: Branches for Fun and Profit
 **Thursday 12/29, 9:00am in JICS Auditorium (5100 RM 128)**
 
 Branching is a central part of any version control system, and git's facilities