Set holiday

The Set holiday action enables holiday mode on a Eurotronic Comet Blue thermostat.

While holiday mode is active, the thermostat uses the temperature you set here instead of following its normal schedule.

Using this action from the user interface

If you prefer building automations and scripts visually, Home Assistant walks you through this action step by step. You pick what to target, tweak a few options, and save. No YAML knowledge required.

To use this action in an automation or script:

1. Go to Settings > Automations & scenes.
2. Open an existing automation or script, or select Create automation > Create new automation.
3. If you’re setting up a new automation, add a trigger in the When section. Scripts don’t need a trigger. They run when something else calls them.
4. In the Then do section, select Add action.
5. From the search box, search for and select Eurotronic Comet Blue: Set holiday (away mode).
6. Select what you want to control. Under By target (see Targets), pick one or more thermostats.
7. Set From, To, and Temperature.
8. Select Save.

Options in the UI

Using this action in YAML

If you work directly in YAML, or you want to know exactly what Home Assistant does under the hood, this section has the technical reference. It lists the field names you use in YAML, their types, and which ones are required.

In YAML, refer to this action as eurotronic_cometblue.set_holiday. A basic example looks like this:

action: eurotronic_cometblue.set_holiday
target:
  entity_id: climate.living_room_radiator
data:
  from: "2026-12-24 17:00:00"
  to: "2026-12-31 23:30:00"
  temperature: 17

This puts climate.living_room_radiator into holiday mode from December 24 at 5:00 PM until December 31 at 11:30 PM and keeps the thermostat at 17°C during that time.

Options in YAML

Targets of the action

This action requires a target. The target is the object of the action. You can point the action at a single entityAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more], a device, an area, a floor, or a label, and Home Assistant will run the action on every matching eurotronic_cometblue entity behind that target.

• Entity: one specific eurotronic_cometblue entity, such as eurotronic_cometblue.living_room.
• Device: every eurotronic_cometblue entity that belongs to a device.
• Area: every eurotronic_cometblue entity in a room or area.
• Floor: every eurotronic_cometblue entity on a floor.
• Label: every eurotronic_cometblue entity that shares a label.

You can also select different target types in one action. For example, you can add a specific entity and an area as targets in the same action to run the action on both of them at once.

Good to know

• The thermostat does not follow its normal schedule while holiday mode is active.
• The temperature range for this action is 8°C to 28°C in steps of 0.5°C.
• To end holiday mode early, you need to reset it on the thermostat itself.

Try it yourself

Ready to test this? Open Settings > Tools > Actions, search for this action, fill in the fields, and select Perform action. You see what happens on your actual entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more] without writing a line of YAML.

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with the action you’re calling and what you expected to happen, or share on our subreddit /r/homeassistant.