They are different - though often tried for the same kinds of use case. Here's https://hledger.org/hledger.html#secondary-dates https://hledger.org/hledger.html

They are different - though often tried for the same kinds of use case. Here's https://hledger.org/hledger.html#secondary-dates https://hledger.org/hledger.html#secondary-dates (hledger's name for effective dates) vs https://hledger.org/hledger.html#posting-dates https://hledger.org/hledger.html#posting-dates. (Both features come from Ledger.)