All Tier-Qualifying Nights and points earned in connection with a stay are credited to the Member for the Calendar Year in which the Member checked out of the applicable stay, unless Hyatt, in its sole discretion, applies such Tier-Qualifying Nights and points as having been earned in the Calendar Year of check-in. That is, any and all Tier-Qualifying Nights and points earned as a result of a stay with a check-in date on or before December 31 of Calendar Year 1 and a check-out date on or after January 1 of Calendar Year 2 will be credited towards the Member’s participation in the Program for Calendar Year 2 (unless Hyatt elects to apply then to Calendar Year 1 in its sole discretion).