Does anyone know if any providers have a historical economic release calendar? For example, releases of things like ADP private employment, or ISM surveys? I ask because I would like to backtest a strategy that uses these numbers, but would want to obviously avoid lookahead bias and not use a data-series prior to its release. I have the release data itself, but unfortunately it is labeled as
YYYY-MM (for example for monthly releases), with no reference as to the actual day of release.
I am willing to pay a small amount if needed - I understand this is not "traditional" data by most means.