90 days. The season card is opened once every three months, and there are 30 days in a month, so the season card in the gym is 90 days. In real life,1-March is the first quarter, April-June is the second quarter, July-September is the third quarter and10-65438+February is the fourth quarter. As far as the gym season card is concerned, it doesn't just mean which season it must be. You can open the card at any time within three months.