How to use Attribute and only Time Value

Configuration
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1

Hi All

I am very new to Home Assistant.

I have a calendar entity, that has attributes that details the upcoming event I am interested in.

Start time 19 March 2023 at 10:00:00
End time 19 March 2023 at 12:30:00

I have a 2 part question.
1 - How do I use the attribute as a trigger / condition for an automation
2 - How do I strip the time value from the attribute, as I am not interested in the date.

The intended use is
If my home battery is less than 35%,
And the next power outage is 2 hours away (-2 hours from the above start time)
Switch my inverter to battery charge mode.

I would ideally like to use the UI and not YAML if at all possible

Thanks

2

Create an automation with a Calendar Trigger with a 2 hour offset and a Numeric State Condition that confirms the battery is below 35.

References:
Calendar Trigger
Numeric State Condition

You’re free to use whatever you want but automations are shared in YAML format, not as screenshots.

FAQ - Format it properly