In the Standard Format you cannot use any cards in your deck that were not released in V Series.
However, in the Premium Format you can use all cards currently released.
You can easily tell what cards can and cannot be ran in the Standard format by the design of the card border and effect box is designed much differently than it used to be, and at the bottom left of the card next to its set number, there will be a small silver V, any card with this small Silver V can be ran in the Standard Format, any card without this V cannot be ran in a Standard Format deck. This also includes Strides, which do not exist in the Standard Format.