AGGREGATE was built to handle messy data from the start.
If the Excel YEAR function is not working on your Windows 11/10 PC, change the cell format, convert text dates to real dates, remove hidden spaces from dates, etc.
Q: I found an anomaly with a rather simple Excel computation; specifically, Excel calculates 111,111,111 times 111,111,111 to equal 12,345,678,987,654,300, which is ...