Hello, I'm an expert in calendar studies and time management. Let's dive into the question about the number of weekend days in 2017.

First, we need to establish the number of weekends in 2017. Since a week consists of 7 days, and there are 52 full weeks in a year, we might initially think there are 52 weekends. However, 2017 started on a Sunday and ended on a Monday, which means there's an extra day at the beginning and the end of the year that could potentially be part of a weekend.

To calculate the exact number of weekend days, we need to consider the total number of days in 2017 and then determine how many of those days fall on a Saturday or Sunday.

2017 was not a leap year, so it had 365 days. Now, let's count the weekends:

- There are 52 full weeks, which gives us 52 Saturdays and 52 Sundays, totaling 104 weekend days.
- Since 2017 started on a Sunday, January 1st is a weekend day, adding one more to our count.
- The year ended on a Monday, so December 31st is not a weekend day.

Adding the extra day from the start of the year to our total, we get 104 + 1 = 105 weekend days in 2017.

So, the answer is: 105 weekend days in 2017.

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Most years have 365 days, but a leap year has 366 days. That adds up to 52 weeks (where each week is exactly 7 days) PLUS 1 or 2 additional days. The year 2017 has exactly 365 days. Now if the year starts on a Saturday in a non-leap year, you end up with 53 Saturdays.read more >>