Matplotlib calender: switch to tz (#849)

Author: story645

calendars/matplotlib.yaml

@@ -7,9 +7,9 @@ events:
       All are welcome.
 
       Meeting notes and agenda: https://hackmd.io/@matplotlib
-
-    begin: 2022-03-24 19:00:00 +00:00
-    end: 2022-03-24 20:00:00 +00:00
+    timezone: "Europe/Berlin"
+    begin: 2022-03-24 21:00:00
+    end: 2022-03-24 22:00:00
     url: https://zoom.us/j/384435716?pwd=WFpxVWxoYXArTDFzN1lWaHNoOE8xZz09
     ics: RRULE:FREQ=WEEKLY;BYDAY=TH