What’s your favourite day of the week? Check if it's the most common day of the week in a 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 particular year. The result has to be a list of days sorted by the order of days in a week (e. g. ['Monday', 'Tuesday']). Week starts with Monday.
Input: Year as an int.
Output: The list of most common days sorted by the order of days in a week (from Monday to Sunday).
most_frequent_days(1084) == ['Tuesday', 'Wednesday'] most_frequent_days(1167) == ['Sunday']
Preconditions: Year is between 1 and 9999. Week starts with Monday.