While the the book-by date remains December 31, 2022, Holland America Line has extended the sail-by date on all COVID-19-related FCCs from December 31, 2022, to December 31, 2023. This change marks a wonderful opportunity to finally go on your long-awaited Holland America Line vacation in 2023. Any unused cash-backed or refundable FCCs will automatically be refunded to guests once they’ve expired.