During the revamp (https://github.com/odoo/odoo/pull/138670) the classes `.o_event_hatched` and `.o_event_striked` were moved. The `o_event_hatched` works on day, week, and month view but not in Year view of the `hr_holidays` module where the events all look like they have the same status. The `o_event_striked` was removed by mistake. To fix this issue, we move the `.o_event_hatched` where it isn't under the `.fc-event` selector (because this one doesn't exist in Year view), and we put back `o_event_striked`. task-3617333 part of task-3575827 closes odoo/odoo#144208 Signed-off-by: Romeo Fragomeli (rfr) <rfr@odoo.com>