Tagged month-end

Unrealised foreign exchange gain or loss on foreign-currency balances revalued at a period-end rate.

Add calendar months to an ISO date, clamping to the month end: 31 Jan + 1 month is 28 or 29 Feb.

Split an invoice across accounting periods by days of service, for accruals, prepayments and deferred income.

The next renewal date after a given day, from a billing anchor and interval; month-end safe.