Making ‘when’ just as important as ‘how much’ Eastern Standard Time (EST) is the default time zone for API responses. If you are a client outside of this time zone, you may need to create an utility to convert EST to your preferred time zone.At KeyBank, we follow the international standard for date and time format (ISO 8601). API responses and error responses include a timestamp in the following format: YYYY-MM-DDTHH:MM:SS. The timestamp returns the date (year-month-day) followed by 'T' to indicate time (hour-minutes-seconds) in 24-hour notation for EST.For example, if you get a response with "Timestamp": "2022-09-15T04:49:03", that means that the action or response was completed on September 15, 2022 at 4:49 a.m. EST.