Event cards show wrong dates

Problem/Motivation

I have the feeling a lot is going wrong.

The event cards show a date which has nothing to do with the event (7. June 2025)
The event is on 27 November 2024 (see event on Drupal.org)
The event in the sidebar shows a different date as well 21. May 2025

Steps to reproduce

1. Go to: https://www.drupical.com/?continent=EU&country=Netherlands&type=drupalca...
2. On the map click on the Splash Awards event
3. See the date "7. June 2025" on the card
4. Check event in sidebar: 21. May 2025

Report /. Steps to reproduce #2

Per 6 Jan 2025:

I am not seeing discrepancies between the actual date (on https://www.drupal.org/community/events) and the Drupical right sidebar.

However,:
1. Click on any event in the Drupical right sidebar.
2. Then click on any event on the map. The popup cards ALL show the date from the last-clicked-in-sidebar event.

Proposed resolution

Fix date issues. (Check the 'source' of the date on the popup cards, which seems to be wrong.)

Remaining tasks

Deploy fix