Field Day Vouchers must be utilized for the mandatory in-person segment of your certification in your state or province before they reach their expiration date. Should your voucher expire, or if you're unable to locate an in-person course that suits your schedule, reaching out to your state's relevant department is necessary to explore your options.
There might be a chance for an extension on the voucher's validity. However, if an extension isn't feasible, you may have to re-enroll and pay for the course again to receive a new voucher.