When Sandy first enters the school for the first time and she is registering for the school, Ms. Murdoch says how many days till christmas? Sandy replies 86. If you ever counted all the days from september till december you will see that they are 122 days. Lets suppose that like this movie was ment to be in 1958-1959 that they started school the day after Labor Day. there is still no way that there were 86 days till christmas. When Sandy started to attend Rydell High it was the first day of school because even Sonny said that his mother always made him a sandwich on every first day of school. Sandy started the same day as everyone else. This is a slip up.