How do I understand the response when using the '1d' Timestamp?

When using the ‘1d’ timestep, Tomorrow.io provides the daily aggregation rather than the next 24 hours. Tomorrow.io defines a full day from 6 AM on the requested day to 6 AM of the next day. This means that when you use the ‘1d’ timestep, there is no need to also add a start time as the call will ignore that and only look at the date to provide the data from 6 AM to 6 AM.