"The Saturday after Thanksgiving"

When we make plans with people, does our interpretation of language with regard to time alter based on what part of the country we reside?

Just yesterday, I, who am originally from Nebraska, was making tentative plans with someone, who has always lived in Ohio. She's back in school, has already reached the burnt-out stage, and said, "The Saturday after Thanksgiving (when finals are over), we're going out and getting plastered!"

I laughed, and said, "Sure, sure. That sounds like fun," before thinking about what she just said and realizing I'll have family in town Thanksgiving weekend (Wednesday through Sunday), so I had to ask, "Wait, which Saturday is this? You said the Saturday after Thanksgiving, right? If it's THAT Saturday, I'll have family in town, so it might need to be the following weekend, if that's okay..."

She chuckled and said, "Oh, that's right - you're a Nebraskan. I'm not talking about the Saturday over Thanksgiving weekend, but that next Saturday." She then teased me about being technical and precise.

I then asked my mother, "Okay, this is a random question, but if you were making plans with someone, and he or she said, 'We should do something the Saturday after Thanksgiving, what day would you think he or she was talking about exactly?"

She paused, before saying, "Uh, two days after Thanksgiving."

I then laughed, told her the story which prompted me to ask her the question in the first place and said, "Ah, well, I'm glad to know it's not just me then."

She chuckled, and then said, "No - maybe Ohioans are special or something."

I've always been very technical and precise, sometimes in order to be a smart aleck and other times because I just like giving people the clearest image possible, so it minimizes the risk of a misunderstanding. Whether I'm technical and precise or not, however, I have a hard time understanding how, when told I should do something with another the Saturday after Thanksgiving, I should know to take that as two Saturdays after Thanksgiving. Last I heard, Thanksgiving is celebrated on a Thursday and correct me if I'm wrong, but Saturday comes after Thursday during the course of a week. So, when someone says, "We should do something on the Saturday after Thanksgiving," for some strange reason, I think they're talking about that Saturday over Thanksgiving weekend, which would be two days after the holiday. 

The next time she goes vague on me with plans or I'm not sure whether or not she's being vague, the conversation may go a little something like this:

Her: "We should do something the Friday after Christmas."

Me: "So long as Armageddon doesn't strike us, there will be many Fridays after Christmas. Were you talking about that very next Friday? One in early-January, mid-February, late-June perhaps?"

Her: "Smarta*s!"

Me: "I know - so seriously, which Friday? That very next one?"

Her: "No, silly - the one after that! Duh!"

Me: "Ah, now I get it." ::confused look on my face::