Criterion for the date range of the start of the booking.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/common/criteria.proto)

| Fields ||
|---|---|
| ## `end_date` | `string` End date in the YYYY-MM-DD format. |
| ## `start_date` | `string` Start date in the YYYY-MM-DD format. |