This has been a month for seeing old friends. I got an email a couple of weeks ago from an old friend from college. she and her family are visiting L.A. for a week. they plan to see family and to visit old friends. since she moved away , I hadn't seen her in ages. I'm looking forward to meeting her new kids and seeing her again. 

请问这里的this has been a month for seeing old friends 指的是see old friends 这件事持续了一个月还是说这件事之后已经有了一个月？还有这里不是说他们全家来吗，为什么又是探望家人？