Add weekday claculation dataset

[andreaskoepf]

Generate a weekday calculations dataset class and unit tests.

Here are some example questions which could be converted into templates:

• "If today is Wednesday, March 13, 2024, what day of the week will it be in 10 days?
• "A project started on Monday, February 5, 2024. What day of the week will it be after 21 days?"
• "If the first day of 2024 was a Monday, what day of the week will December 31, 2024 be?"
• "What day of the week was January 15, 2024?"
• "In 2024, how many Fridays are there in February?"
• "How many business days (Monday-Friday) are there between March 1, 2024 and March 15, 2024?"
• "What day of the week will it be 100 days after Tuesday, January 23, 2024?"

Please include further instructions in the question to specify the expected answer format.

The weekday tasks are an interesting problem for RL because even by guessing there is a 1/7 chance to get it right. Also there is a significant complexity gap between dates with weekday reference information and only dates, e.g. while many humans can easily tell you the weekday in 10 days given the current weekday calculating the weekday of a random date is much harder.

[andreaskoepf]

@bjiro thanks for self-assigning 👍 !