Use an automation to set an input_boolean on/off for the desired dates. Easy-peasy.
What you’re requesting would require the ability to set a binary_sensor’s state. That would normally be done using a service. However, binary_sensor does not have services. So your feature request requires a significant enhancement to binary_sensor.
If you absolutely wish to use a binary_sensor, there is a way to achieve what you want using an MQTT Binary Sensor.
Create an MQTT binary_sensor called binary_sensor.vacation that is subscribed to a topic like holidays/vacation.
Create an automation that triggers on the day your vacation begins and make it publish ‘ON’ to holidays/vacation. That will make binary_sensor.vacation turn on.
The same automation can be used to trigger when your vacation ends. Have it publish OFF to holidays/vacation. That will make binary_sensor.vacation turn off.