diff --git a/data/evenementen/kalender/2023-09-17-nllgg.yaml b/data/evenementen/kalender/2023-09-16-nllgg.yaml
similarity index 73%
rename from data/evenementen/kalender/2023-09-17-nllgg.yaml
rename to data/evenementen/kalender/2023-09-16-nllgg.yaml
index 0d2739d..fbfddd9 100644
--- a/data/evenementen/kalender/2023-09-17-nllgg.yaml
+++ b/data/evenementen/kalender/2023-09-16-nllgg.yaml
@@ -1,14 +1,14 @@
-id: nllgg-2023-09-17
-date_start: 2023-09-17
-date_end: 2023-09-17
+id: nllgg-2023-09-16
+date_start: 2023-09-16
+date_end: 2023-09-16
 event_address:
   street_address: Eykmanlaan 1200
   postal_code: 3571 KH
   city: Utrecht
   country: NL
 event_attendance_mode: offline
-event_start: 2023-09-17T10:00:00+0200
-event_end: 2023-09-17T16:00:00+0200
+event_start: 2023-09-16T10:00:00+0200
+event_end: 2023-09-16T16:00:00+0200
 event_free_access: true
 event_is_online: false
 event_organizer: NLLGG
diff --git a/data/evenementen/kalender/2023-11-19-nllgg.yaml b/data/evenementen/kalender/2023-11-18-nllgg.yaml
similarity index 73%
rename from data/evenementen/kalender/2023-11-19-nllgg.yaml
rename to data/evenementen/kalender/2023-11-18-nllgg.yaml
index 81513b9..43a5e7e 100644
--- a/data/evenementen/kalender/2023-11-19-nllgg.yaml
+++ b/data/evenementen/kalender/2023-11-18-nllgg.yaml
@@ -1,14 +1,14 @@
-id: nllgg-2023-11-19
-date_start: 2023-11-19
-date_end: 2023-11-19
+id: nllgg-2023-11-18
+date_start: 2023-11-18
+date_end: 2023-11-18
 event_address:
   street_address: Eykmanlaan 1200
   postal_code: 3571 KH
   city: Utrecht
   country: NL
 event_attendance_mode: offline
-event_start: 2023-11-19T10:00:00+0200
-event_end: 2023-11-19T16:00:00+0200
+event_start: 2023-11-18T10:00:00+0200
+event_end: 2023-11-18T16:00:00+0200
 event_free_access: true
 event_is_online: false
 event_organizer: NLLGG