Is it unreasonable for a new grad to say no to any and all night shift positions?

Yes, it is. And it may be to your advantage to begin on nights with a good preceptor, as nights are generally quieter and you have more time to solidify skills and routines than on days. In a job market which is tough, take the shift offered and after 6 months (or whatever time protocol your hiring institution may have) request transfer to the day shift. If you have family or personal issues that require you to have a day position exclusively, do not expect to be hired immediately as most new grads (not all, but most) go to nights first - at least in our metropolitan area. You may need to sacrifice some salary and accept a position out of the hospital. With some experience you, you have a better chance of being offered a day shift in a hospital.

If she doesn't mind losing positions to more flexible new grads. In a large metropolitan area with much competition, wise new grads do not do that. They start at night if needed, and stick it out until another shift has a position open up.

I was a new grad 6 years ago, so nursing did change a lot, but I only ever did days and know plenty of new grads who started on days. Of course competition for days is always higher (even as experienced RN) and some units such as ED you may not get to do the 7a-7p shift as a new grad. If you are set on not even trying nights (like I was) keep applying eventually someone will give you day shift. On pcu and med/surg units it’s a lot easier due to less competition.

Not unreasonable, but honestly, they will put you with a preceptor and you’ll have to work their shifts when you’re in orientation. If you have children or seriously extenuating circumstances just talk it to your Nurse Manager. But in my experience every new nurse needs to experience different shifts. I ended up actually preferring nights. Worked with my life, child and I just liked the vibe of the staff. I liked not having visitors or running patients all over for appointments. Depends on your unit as well.

Yes, if you are wanting to work in a hospital. If you don’t want to work nights consider day surgery or a doctor’s office, then you would most likely not be expected to work nights, weekends, holidays, or take call. It was always surprising when new grads thought they wouldn’t have to work Christmas or New Year’s and could continue to go on their two-week long family vacations when they had no PTO sorted up.
I saw L&D on your tags. You will definitely need to work nights, which, honestly, is better at first.
Once you get hired you can ask about the process of going from nights to days, but don’t expect it to happen quickly.

probably not unless you find a place that still has a 3-11 shift.