Time Out says
Until March 31st, those who decide to reserve a room at the Grand Hyatt and the Hyatt Regency for 2 nights will be offered a free night of stay. The actual offer will last until April 23rd. If a city destination isn’t your fit, Jeju’s Hyatt hotel also has the same promotion for a perfect spring getaway. If you’re a Global Hyatt Member, you will be able to get the appropriate points according to the choice of hotel.
▶Reserve before March 31st