DAX : YTD on 445 Calender and Irregular End Dates

In a previous post I looked at the built in DAX Total to date functions (TotalYTD, TotalMTD, TotalQTD) which sum calendar periods to an end date. The YTD function is somewhat flexible because it allows a year end date to be passed as an optional argument in the function. However, the end date is static in the formula, that is, the same year end date is applied must be applied to all years (also indicating the start of the next year is the day after the prior year ends). The 445 calendar contravenes this requirement because the yearend date (and year start date) is not consistent between years.