The DAT is offered every single day of the year. You must get a DENT pin and register and stuff and you can do that as early as now. You pay the $320 and pick a date. If you want to apply in the earliest of the early, take the DAT by June 1st. However, most people need a good 2 months for studying. So early July is a better bet. Many people also take the DAT in August, but the earlier the better. Good luck 😎.