Power Query Add / Insert Row on condition

[jdellasala]

There's a web site (Market Holidays for United States for 2022) that has a small table of the list of Market Holidays. Long story short, I was able to pull in all the tables from 1900 to 2100 using a Power Query function. In doing that I discovered that 56 years (including 2017) are missing the Market being closed for New Year's Day on January 2nd when the 1st falls on a Saturday or Sunday.

The table is simply 2 rows - Date and Holiday. The question is how can add a row in the function if the Holiday "New Year's Day" doesn't exist in the 2nd column, giving the first (Date) column the value of the first Tuesday in January (it can be either the 2nd or the 3rd depending on when the 1st was), and "New Year's Day" to the second (Holiday) column?

Thanks

 

[jdellasala]

OK, I should have waited a bit longer. I figured out how to fix the problem.

I generated another table of years from 1900 to 2100, created January 1st for all of the rows by adding a custom column, added a "Day of Week" column, added another column for "Holiday" (with a value of "New Year's Day Observed") if the Day of Week equaled 0 or 6, got rid of the blank rows in that column, and finally appended that table to the one pulled in from the Web which was then sorted by date.

It's funny how one (me!) can be completely oblivious to an answer staring you in the face! I had already generated one table with a column of values from 1900 to 2100, but was trying to figure out how to do it in THAT table instead of just generating a table with the needed data.

Oh yeah, the beauty of Power Query - I emailed the site about the issue, and if they fix it my table will end up with two records for every New Year's Day that falls on a Saturday or Sunday. But if that does happen and I need to fix it (because it bothers me!), I can just delete the "Appended Query" step in the full table! It's a beautiful thing!!