TBF, "last day of the week" is the same as saying "on sunday" (or "on saturday" if you are from a crazy part of the world ) so a tick box is probably just adding complication.
I think it makes sense to leave "of the week" ISO standard.
But I have noted you comment and not 100% ruled it out just yet.
The only downside of that is that it is such a short name and might easily end up with a name clash? Shouldn't such short, generic names be reserved for core features rather than contributed nodes?
And actually, I am not convinced that it gives enough meaning to be able to pick it out from the crowd. Having the "gate" postfix accurately describes its effect.
Altitude and Azimuth are important solar (and lunar) properties. eg the sun shines into Newgrange when it's azimuth is between 134 and 138 degrees and it's altitude is greater than 0.5 degrees.
The node seems not to understand an input including the words altitude or azimuth, though "sun above 30" is accepted and explained as "Allow when: sun altitude is above 30 degrees"