Is the unlimited soup and salad offered on sundays

Yes. Every day.

Yes, it should be available on all days & times.

Ad far as i know

I believe so. It's part of their entrees, which are generally available every day, that I know of. When it's included with their specials, too, the unlimited soup and salad still applies on Sundays.

Everyday

Yes

Yes, it's offered every day.