Dear Richard,
I think there is a logical mistake in the Is date in this year to date function you present in the lesson 01 at 7:05. The formula you give is Year(D) = Year(Date()) and Month(D) <= Month(Date()) and Day(D) <= Day(Date()). I am writing this on DATE() = 2023-05-16. If you apply your formula to the day D = 2023-04-18, the result would be false due the day in April being a bigger number than the day in May (18>16). This is not the result you intended to get (explanation at 7:28).

Kind regards,
Jeff