I'm hard at work with a Google Sheets spreadsheet of a huge catalog of wiki edits I made over the years, and I'm having difficulties trying to find the most common day within a year. I've been able to check the most common day by checking with wikis and account, but I had no luck with going by year.
Here is the formula I developed to track most commonly edited day for a particular wiki:
=IFERROR(INDEX('In one timezone (UTC)'!E:E,MODE(IF('In one timezone (UTC)'!A:A="Nookipedia", MATCH('In one timezone (UTC)'!E:E,'In one timezone (UTC)'!E:E,0)))),"None")
And here was my attempt at trying to find the most commonly edited day of a particular year:
=IFERROR(INDEX('In one timezone (UTC)'!E:E,MODE(IF(YEAR('In one timezone (UTC)'!E:E)="2012", MATCH('In one timezone (UTC)'!E:E,'In one timezone (UTC)'!E:E,0)))),"None")
