* Set a field with the specified date. If the field is not found, it is added. If the field is
     * found, the existing values are replaced.
     */
    operator fun set(
      name: String,
      value: Date,
    ) = set(name, value.toHttpDateString())

    /**
     * Set a field with the specified instant. If the field is not found, it is added. If the field
     * is found, the existing values are replaced.
     */