> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/ConversionValueRule.ValueRuleItineraryAdvanceBookingWindow).

Range for the number of days between the date of the booking and the start of the itinerary.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/resources/conversion_value_rule.proto)

| Fields ||
|---|---|
| ## `max_days` | `int32` Maximum number of days between the date of the booking the start date. |
| ## `min_days` | `int32` Minimum number of days between the date of the booking the start date. |