In financial statements, the most recent financial period is put first, and next to it is the previous period for comparison: 2017 - 2016. To the frustration of some accountants and CFOs, I insist on putting the years the other way around: 2016 - 2017.
- The eye is used to moving left to right when looking at time series data
- It makes tables match line or column graphs that are in the presentation
- It makes it easer to compare data across 3 years or more
I am not trying to change the reporting practices for financial statements. In the annual accounts, the current year is the most important one. It needs to be accurate and is usually shown with far more digits (precision) than I would use in a presentation. A comparison to last year's numbers is almost an extra, not the main purpose of the page.
Every financial document has its own purpose and own audience: spreadsheets, financial statements and presentation decks. And among presentation decks you can distinguish between quick and dirty documents to discuss (early results), detailed financial information for the investor community, and more generic financial slides for a general company presentation. Different purpose, different slides.