[2019] Standard?

@ChosenCripple#44897:

What game modes are considered standard? I'm building a deck but i got a warning about cards being out of rotation. I understand what rotation is, but I want to be sure im not screwed out of my wilds.

All Arena modes (except for the upcoming Historic) are Standard. The game is just letting you know that the card you crafted is going to rotate out soon because sets only remain in Standard for a limited time. Those cards won't disappear from your account, but you won't be able to play it in Standard formats once it rotates out. Ixalan, Rivals of Ixalan, Dominaria, and M19 sets are going to be rotating out later this year.

This should help you out.

https://magic.wizards.com/en/content/standard-formats-magic-gathering