Would it not be better to let a user choose a date range instead of one from a fixed set in multiple of 30 days? If I wish to share the P&L of a specific FY, then I can't do that! The problem with this approach is with theLive P&Lalso enabled, every day this gives a different picture.
ACustomchoice can be added in the drop-down to select a date range. Views?
I understand your logic of fixed date ranges is to avoid manipulations. However, you can provide two drop down fixed options: current financial year and the previous financial year. Since being fixed ranges, these will serve your purpose.