Enumerates days of the week, for example, "Monday".

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

| Enums ||
|---|---|
| ## `FRIDAY` | Friday. |
| ## `MONDAY` | Monday. |
| ## `SATURDAY` | Saturday. |
| ## `SUNDAY` | Sunday. |
| ## `THURSDAY` | Thursday. |
| ## `TUESDAY` | Tuesday. |
| ## `UNKNOWN` | The value is unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |
| ## `WEDNESDAY` | Wednesday. |