Update seminar.md

seminar.md

@@ -26,7 +26,7 @@ The seminar is open to anyone. If you are interested, just join the meeting. No
 
 ### Time, Duration, Location
 
-* Every second Monday, starting at 14:00 UTC (= 09:00 EST = 15:00 CET = 23:00 JST)
+* Every fourth Monday, starting at 14:00 UTC (= 09:00 EST = 15:00 CET = 23:00 JST)
         <!-- * ~~Before March 29: 14:00 UTC (= 09:00 EST = 15:00 CET = 23:00 JST)~~ -->
         <!-- * After March 29: 13:00 UTC (= 09:00 EDT = 15:00 CEST = 22:00 JST) -->
 * The seminar is strictly limited to 1 hour and presentations should be around 30 min to allow for discussion