Why would they use single notation for a year (2024) if the fiscal year starts in 2023 and ends in 2024? I've always seen organizations that do that write it as 2023/24 or 2023-24
When I worked civil service, it was always written as just the current year. So if it was after the end of the fiscal year for the current calendar year (2024) it'd always be referred to simply as FY2025 even though it's October. Not sure why, but probably just shorthand.
Nope, I work in finance departments for lots of organizations as a contractor. I've never seen it written as only a single year. I am Canadian though, so maybe it's just a Canada thing.