Update Important-Dates: remove November, update challenge timeline with current status

Important-Dates.md

@@ -2,16 +2,17 @@
 
 # Important Dates
 
-## Upcoming Meetup Schedule Changes
+## Upcoming Meetup Schedule
 
-### Special Notice: November & December 2025
+### Next Meetup
 
-**IMPORTANT**: The next two meetups will NOT be on the usual 3rd Wednesday:
-
-- **November Meetup: November 12th, 2025**
 - **December Meetup: December 10th, 2025**
+  - Challenge announcement for December 2025 challenge
+  - Judging of November 2025 challenge submissions
 
-**We will resume normal 3rd Wednesday schedule after the New Year.**
+### Special Note
+
+**December meetup is NOT on the usual 3rd Wednesday** - We will resume normal 3rd Wednesday schedule starting January 2026.
 
 ## Regular Meeting Schedule
 
@@ -29,16 +30,31 @@
 
 ## Challenge Timeline
 
-### October 2025: "Is it Glass or Clearly Natural?"
+### October 2025: "Is it Glass or Clearly Natural?" (Completed)
+
 - **Challenge Announcement**: October 1, 2025
 - **Model Specification Released**: October 13, 2025
 - **Submission Deadline**: October 28, 2025
 - **Judging Period**: October 29-30, 2025
 - **Winner Announcement**: October 31, 2025
 
-### November 2025: [Challenge TBD]
-- **Announcement**: November 12th meetup
-- **Details**: To be determined
+See the [Challenge Archive](Challenge-Archive) for complete details.
+
+### November 2025: "Wait, This Was Printed? How Are There No Layer Lines?"
+
+- **Challenge Announcement**: November 12, 2025
+- **Submission Deadline**: December 10, 2025
+- **Judging**: December 10, 2025 meetup
+
+See [Current Challenge](Current-Challenge) for complete details.
+
+### December 2025: [Challenge TBD]
+
+- **Challenge Announcement**: December 10, 2025
+- **Submission Deadline**: January 2026 meetup
+- **Details**: To be announced
+
+See [Upcoming Challenge](Upcoming-Challenge) for updates.
 
 ## Meeting Locations
 
@@ -50,4 +66,4 @@
 
 ---
 
-*Last updated: October 16, 2025*
+*Last updated: November 15, 2025*