What is your favorite day of the week? Check if it's the most frequent day of the week in the year.

You are given a year as an integer (e.g. 2001). You should return the most frequent day(s) of the week in that year.

Input: Year as an int.

Output: The list of most frequent days in the Gregorian calendar year.

Examples:

most_frequent_days(2427) == ['Friday']
most_frequent_days(2185) == ['Saturday']
most_frequent_days(2860) == ['Thursday', 'Friday']

Tests:

most_frequent_days(1770)
most_frequent_days(1785)
most_frequent_days(1984)
most_frequent_days(2000)

Good luck!

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