If you have not yet used your voucher in the Sunweb Group travel shop or requested a refund for the value of your voucher, your voucher has been extended with 3 years in May 2021. As such, your voucher will continue to be valid until 4 years from the original issue date. The exact validity period is mentioned on the voucher itself.
You need to use your voucher before this date in the Sunweb Group travel shop for Tomorrowland Winter or any other travel package offered by Sunweb Group. The date of departure of your new travel package can be at a later timing.