How do I add an offset to an events: state? i.e. "1 hour before sunset"

[YAMLcase]

I'm using sun.sun as the entity, but would like it to trigger 1 hour before below_horizon is true. How's the best way to accomplish this?

[zachowj]

I would recommend using the node-red-contrib-chronos package for sun events.

If you still want to use the sun entity from HA you can use the time node using one of the next_ attributes with the offset field.