[throw0101d]

> BTW - the fictitious calendar is very often used in bond repayments - e.g. https://www.lawinsider.com/dictionary/bond-payment-dates

Some sample calculations at:

* https://www.bondsavvy.com/bonds/accrued-interest-calculation

See also perhaps:

* https://www.investopedia.com/terms/d/daycount.asp