SKProductSubscriptionPeriod daily?

in 11.2 we get access to the SKProductSubscriptionPeriod. An enum that lets us retieve the length of a products subscrption.

The enum has a day case. Yet in iTunesConnect we do not. We also have other lengths available in itunesConnect (6 months for example) that are excluded from the enum. Question is will iTunesConnect change to only allow subscription period declared in the enum or vice versa?

public enum PeriodUnit : UInt {
        case day
        case week
        case month
        case year
    }