The issue where dates from the Events module do not appear in the Calendar module is typically related to how Odoo synchronizes data between these modules. The Events module and Calendar module are separate applications, and their integration is not automatic. Below is a guide to resolving this issue.

1. Understand the Link Between Events and Calendar Modules

• The Events module is designed for managing public or private events, typically for larger audiences or campaigns.
• The Calendar module focuses on internal scheduling, appointments, and tasks.

By default, Events do not automatically sync with the Calendar. You need to enable synchronization or use customization to achieve this.

2. Enable Google Calendar Integration (Optional)

If you use Google Calendar, enabling its integration may help:

1. Activate Google Calendar Sync:
   • Navigate to Settings > General Settings > Calendar Integration.
   • Enable Google Calendar Integration and authenticate your account.
   • Check whether the events sync with Google Calendar and reflect in Odoo's Calendar module.

This solution works only if Google Calendar is being used as the intermediary.

3. Manual Configuration of Event Sync to Calendar

If you want direct synchronization between the Events and Calendar modules within Odoo:

1. Verify Event Dates:
   • Go to Events > Events and ensure the event has the Start Date and End Date set properly.
2. Use Server Actions or Automated Actions:
   • Create a server action or automated action that creates a corresponding calendar entry whenever an event is created or updated.
   Example Python Code for Server Action:

   for event in records:
       # Check if the event already has a linked calendar entry
       existing_meeting = env['calendar.event'].search([('event_id', '=', event.id)], limit=1)
       if not existing_meeting:
           # Create a calendar event
           env['calendar.event'].create({
               'name': event.name,
               'start': event.start_date,
               'stop': event.end_date,
               'partner_ids': [(6, 0, event.attendee_ids.ids)],  # Link attendees
               'event_id': event.id,  # Link to the event
           })
   

   • Attach this server action to the Create or Write action on the Event model to ensure that calendar events are created or updated whenever events are modified.

4. Check Default Views or Filters

If the dates are syncing but not showing up:

1. Check Filters in the Calendar View:
   • Go to Calendar > Filters and ensure that no filters (e.g., only showing tasks or appointments) are preventing the display of events.
2. Set Default Template in Technical Settings:
   • Enable Developer Mode.
   • Go to Settings > Technical > User Interface > Views.
   • Search for the Calendar view linked to the Event model and verify its configuration.

5. Advanced: Custom Development (Optional)

For advanced setups, consider creating a direct relationship between the Events and Calendar modules:

1. Extend the Event Model:
   • Add a Many2one field to link to the calendar.event model.
   • Modify the calendar view to display events tied to the Event module.
   Example Field Addition:

   class Event(models.Model):
       _inherit = 'event.event'
   
       calendar_event_id = fields.Many2one('calendar.event', string="Calendar Event")
   

6. Test the Configuration

• Create a test event in the Events module and verify if it appears in the Calendar module.
• If using server actions or custom code, ensure there are no errors in the logs (found under Settings > Technical > Logs > Server Logs).

Outcome

Once these steps are implemented, events created in the Events module will automatically show up in the Calendar module, either through synchronization, automation, or custom integration. Let me know if you need further details or help with implementing this!

Did you end up finding a solution as I am struggling with the same and can't use the out of the box Google calendar integration this way.