Update Important Dates dropping April Meetup date

wiki-content-gitea/Important-Dates.md

@@ -6,14 +6,14 @@
 
 ### Next Meetup
 
-- **April Meetup: April 29th, 2026**
-  - Challenge announcement for April 2026 Challenge ("Bring an Experiment (Round 2!)")
-  - Judging of March 2026 Challenge ("Bring an Experiment")
-
 - **May Meetup: May 20th, 2026**
-  - Special Topic and activities TBD
+  - Challenge announcement for May 2026 Challenge ("[Theme TBD]")
   - Judging of April 2026 Challenge ("Bring an Experiment (Round 2!)")
 
+- **June Meetup: June 17th, 2026**
+  - Special Topic and activities TBD
+  - Judging of May 2026 Challenge ("[Theme TBD]")
+
 ## Regular Meeting Schedule
 
 ### Standard Schedule
@@ -30,21 +30,13 @@
 
 ## Challenge Timeline
 
-### February 2026: "Bring Your Best"
-
-- **Challenge Announcement**: February 18, 2026
-- **Submission Deadline**: March 18, 2026
-- **Judging**: March 18, 2026 meetup
-
-See [Current Challenge](Current-Challenge) for complete details.
-
 ### March 2026: "Bring an Experiment"
 
 - **Challenge Announcement**: March 18, 2026
 - **Submission Deadline**: April 29, 2026
 - **Judging**: April 29, 2026 meetup
 
-See [Current Challenge](Current-Challenge) for complete details.
+See [Challenge Archive](Challenge-Archive) for complete details.
 
 ### April 2026: "Bring an Experiment (Round 2!)"
 
@@ -52,6 +44,14 @@ See [Current Challenge](Current-Challenge) for complete details.
 - **Submission Deadline**: May 20, 2026
 - **Judging**: May 20, 2026 meetup
 
+See [Current Challenge](Current-Challenge) for complete details.
+
+### May 2026: "[Theme TBD]"
+
+- **Challenge Announcement**: May 20, 2026
+- **Submission Deadline**: June 17, 2026
+- **Judging**: June 17, 2026 meetup
+
 See [Upcoming Challenge](Upcoming-Challenge) for updates.
 
 ## Meeting Locations