Thanks for the feedback.
I wouldn’t call it cherry picking as that suggests I’ve seen the data and chosen the week endings for any other reason than them being 7 days at the end of the month.
If you're comparing Monday vs Saturday vs Wednesday, you're going to see somewhat / drastically different results.
There will be one of each of the 7 days In each dataset. Without data to support your argument I’m going to blindly disagree, and prove you wrong later 😛
How about I expand the results to cover a whole month each time? Would that account for this global Halloween phenomenon you speak of?
Effectively, my comments were intended to clarify that you are performing a trending analysis on data that should not be considered for such a purpose. It would be like polling Trump supporters as to whether or not they like Donald Trump and extrapolating the results from your survey to say it represents the entire population of voters.
I expanded the datasets for January 2019 and Jan 2020 in the following post as there was some merit in you suggesting a week in each month was not enough data. The results look very similar.
I haven't taken a look at that post yet (I apologise) .. I'll take a look