public Builder setDayValue(int value) {
      day_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
<pre>
Optional. Allows to define schedule that runs specified day of the week.
</pre>

<code>.google.type.DayOfWeek day = 1 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The enum numeric value on the wire for day to set.
@return This builder for chaining.
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/WeeklyMaintenanceWindow.java