What year is this yearbook? If it’s a ‘77 this is a complete fabrication because it would not have been published yet, the whole point of a yearbook is to document the school year, so it would be published at the end of the school year in May or June. I was on my high school’s yearbook staff and can definitely vouch for this. On the other hand, if it’s a ‘76 yearbook, that sets up a whole ‘nother set of oddities, such as why a girl would even bring the yearbook from her previous school year to a restaurant the following year at Christmas.
Correction, I’m a year off, ‘78 and ‘77 respectively, not ‘77 and ‘76.