# Change history: Calendar events

[← Changelog](/docs/changelog). Entries: 13.

- 2026-09-19 [FIX-0919-5: the OpenAPI specification and the API reference describe task history, kanban stages and CRM reference aggregation](/docs/changelog/2026-09-19#fix-0919-5-the-openapi-specification-and-the-api-reference-describe-task-history-kanban-stages-and-crm-reference-aggregation)
- 2026-09-16 [NEW-0916-12: calendar events now support include: owner, host, attendee](/docs/changelog/2026-09-16#new-0916-12-calendar-events-now-support-include-owner-host-attendee)
- 2026-08-24 [NEW-0824-12: calendar events can be linked to CRM elements](/docs/changelog/2026-08-24#new-0824-12-calendar-events-can-be-linked-to-crm-elements)
- 2026-08-24 [BC-0824-14: an unknown select field name is refused with 400 on almost every entity](/docs/changelog/2026-08-24#bc-0824-14-an-unknown-select-field-name-is-refused-with-400-on-almost-every-entity)
- 2026-08-17 [NEW-0817-6: Bitrix24 account calendar settings are available through the API](/docs/changelog/2026-08-17#new-0817-6-bitrix24-account-calendar-settings-are-available-through-the-api)
- 2026-07-28 [BC-0728-6: calendar: an unknown select name returns an error instead of an empty object](/docs/changelog/2026-07-28#bc-0728-6-calendar-an-unknown-select-name-returns-an-error-instead-of-an-empty-object)
- 2026-07-28 [NEW-0728-7: calendar: occurrenceIndex and version fields](/docs/changelog/2026-07-28#new-0728-7-calendar-occurrenceindex-and-version-fields)
- 2026-07-28 [FIX-0728-12: calendar: honest offset and hasMore, deterministic order](/docs/changelog/2026-07-28#fix-0728-12-calendar-honest-offset-and-hasmore-deterministic-order)
- 2026-07-28 [FIX-0728-18: windowed search stops once it has the requested rows and reports an incomplete window](/docs/changelog/2026-07-28#fix-0728-18-windowed-search-stops-once-it-has-the-requested-rows-and-reports-an-incomplete-window)
- 2026-07-14 [FIX-0714-7: Calendar: working section batch-delete, clean update errors, no leaked sync fields](/docs/changelog/2026-07-14#fix-0714-7-calendar-working-section-batch-delete-clean-update-errors-no-leaked-sync-fields)
- 2026-07-02 [FIX-0702-6: POST /search reports missing required parameters with a clean error](/docs/changelog/2026-07-02#fix-0702-6-post-search-reports-missing-required-parameters-with-a-clean-error)
- 2026-06-24 [FIX-0624-10: calendar event field types now match real responses](/docs/changelog/2026-06-24#fix-0624-10-calendar-event-field-types-now-match-real-responses)
- 2026-06-18 [FIX-0618-4: calendar event time zone](/docs/changelog/2026-06-18#fix-0618-4-calendar-event-time-zone)