Quantlib has a relatively small set implemented: https://github.com/lballabio/QuantLib/tree/master/ql/time/daycounters https://github.com/lballabio/QuantLib/tr

Quantlib has a relatively small set implemented: https://github.com/lballabio/QuantLib/tree/master/ql/time/daycounters https://github.com/lballabio/QuantLib/tree/master/ql/time/da...