If you have set up your event using a theme such as Basic Mitingu and then activate the Stylish Theme, it will not be automatically applied to the existing event. This is because if you choose to select a different default theme for your account, you wouldn't necessarily want all existing events to have the new default theme automatically applied.
To apply the new theme to an existing event, follow these quick steps.
1. Select the event and then click Edit Details in the event screen.
2. Then scroll to the bottom of the window and click Save Details.
The theme will now be live on the existing event.