In Stadard you can play cards from the last 2 years
Your deck has following restrictions
- Minimum 60 cards
- Maximum 4 of a card name
- 15 card side board is allowed
The rotation works as follows
“Each year, four Magic sets are released and added to Standard. Once per year, when the fall set releases, the four oldest sets in Standard rotate out.”
read more here
https://magic.wizards.com/en/content/standard-formats-magic-gathering
What was your favorite time in Standard?
MTG blog 