Yes. HappenBoard works with block themes and classic themes, and its blocks use your theme’s fonts, colors and spacing.
On a block theme, HappenBoard adds ready-made templates for event pages, the events archive, category and tag archives, and venue and organizer pages. You can change them in the Site Editor like any other template: see patterns and Site Editor templates.
On a classic theme, each event page shows the date, the RSVP form, the venue, the organizer and the other details around the description, inside your theme’s layout. The events archive shows the calendar and the upcoming events, and category and tag archives list their events.
On any theme, you can place HappenBoard blocks in a page, a post or a widget area. If you build pages with Elementor, the calendar and the event lists and grids are also available as Elementor widgets.