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+++ b/seminar.md
@@ -3,15 +3,28 @@ layout: page
 title: SIGMathLing - Seminar
 ---
 
+**NOTE: Time zone changes**
+*From March 29, we will shift the meeting from 14:00 UTC to 13:00 UTC.
+If you live in the Northern hemisphere and switch to daylight saving time, it should be the same local time as it used to.
+Note that some countries may switch a few weeks earlier or later.
+The shift makes it more convenient for our Japanese attendees.*
+
+
+
+
 The SIGMathLing seminar is a bi-weekly (i.e. every two weeks) seminar on mathematical language.
 It is intended as a forum for reporting on results and new developments and discussing them with fellow enthusiasts.
 
+The seminar is open to anyone. If you are interested, just join the meeting. No registration etc. required.
+
 *Please reach out if you are interested in presenting something. We are always looking for talks.*
 
 ### Time, Duration, Location
 
-* Every second Monday, starting at 14:00 UTC (= 09:00 EST = 15:00 CET = 23:00 JST)
-* The seminar strictly limited to 1 hour and presentations should be around 30 min to allow for discussion
+* Every second Monday, starting at
+    * 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
 * The seminar takes place on Zoom:
     * link: <https://fau.zoom.us/j/99327093752?pwd=TnE3bEZNSWhaVllZNWxSenFKelcwZz09>
     * meeting id: 993 2709 3752
@@ -41,5 +54,10 @@ and a mattermost channel for chat. To join the mattermost channel:
 |2021-03-01| Bernhard Schröder | Framed proofs -- Linguistic aspects of proof texts and frames |
 |2021-03-15| Peter Koepke | Isabelle-Naproche |
 |2021-03-29| André Greiner-Petter | TBD |
+|2021-04-12| ? | ? |
+|2021-04-26| ? | ? |
+|2021-05-10| ? | ? |
+|2021-05-24| ? | May be cancelled (public holiday after pentecoast at least in Germany) |
+|2021-06-07| ? | ? |