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# Introduction

Calendar and Event data can be retrieved from the Wall Street Horizon Event Calendar and accessed via the TWS API through the functions IBApi.EClient.reqWshMetaData and IBApi.EClient.reqWshEventData.

It is necessary to have the **Wall Street Horizon Corporate Event Data** research subscription activated first in [Account Management](https://www.ibkrguides.com/clientportal/usersettings/marketdatasubscriptions.htm).

WSH provides IBKR with corporate event datasets, including earnings dates, dividend dates, options expiration dates, splits, spinoffs and a wide variety of investor-related conferences.

Data Classes and Fields PDF