TimeTarget

A target publish or event time. Can be used for seeking to or retrieving the corresponding cursor.

JSON representation 
{

  // Union field time can be only one of the following:
  "publishTime": string,
  "eventTime": string
  // End of list of possible types for union field time.
}
Fields
Union field time. The type of message time to query. time can be only one of the following:
publishTime

string (Timestamp format)

Request the cursor of the first message with publish time greater than or equal to publishTime. All messages thereafter are guaranteed to have publish times >= publishTime.

A timestamp in RFC3339 UTC "Zulu" format, with nanosecond resolution and up to nine fractional digits. Examples: "2014-10-02T15:01:23Z" and "2014-10-02T15:01:23.045123456Z".
eventTime

string (Timestamp format)

Request the cursor of the first message with event time greater than or equal to eventTime. If messages are missing an event time, the publish time is used as a fallback. As event times are user supplied, subsequent messages may have event times less than eventTime and should be filtered by the client, if necessary.

A timestamp in RFC3339 UTC "Zulu" format, with nanosecond resolution and up to nine fractional digits. Examples: "2014-10-02T15:01:23Z" and "2014-10-02T15:01:23.045123456Z".