## Addresses full stack for #18554
- Add new `timezone` column to `calendar_events` table
- When fetched from Google's API, save calendar user's timezone in this
new column along with rest of event data
- Implement datastore method to retrieve the start time and timezone for
a host's next calendar event as a `HostMaintenanceWindow`
- Localize and add UTC offset to the `HostMaintenanceWindow`'s start
time according to its `timezone`
- Include the processed `HostMaintenanceWindow`, if present, in the
response to the `GET` `hosts/{id}` and `hosts/identifier/{identifier}`
endpoints
- Implement UI on the host details page to display this data
- Add new and update existing UI, core integration, datastore, and
`fleetctl` tests
- Update `date-fns` package to the latest version
<img width="1062" alt="Screenshot 2024-06-26 at 1 02 34 PM"
src="https://github.com/fleetdm/fleet/assets/61553566/c3ddad97-23da-42c1-b4ed-b7615ec88aed">
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
<!-- Note that API documentation changes are now addressed by the
product design team. -->
- [x] Changes file added for user-visible changes in `changes/`
- [x] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements)
- [x] Added/updated tests
- [x] If database migrations are included, checked table schema to
confirm autoupdate
- For database migrations:
- [x] Checked schema for all modified tables for columns that will
auto-update timestamps during migration.
- [x] Confirmed that updating the timestamps is acceptable, and will not
cause unwanted side effects.
- [x] Manual QA for all new/changed functionality
---------
Co-authored-by: Jacob Shandling <jacob@fleetdm.com>