Families By Dorothy and Tom Hoobler

I read the book 1990's Families by Dorothy and Tom Hoobler. This book is about a few different families, who are all brought together by the Y2K. They are all at their Great great grandmother Nell's 100th birthday party. The party takes place on the 31st of December, and one of the dad's is really concerned about the year, and he tried to keep all of his family in the bomb shelter that he built.