Describes when the loyalty program expires.
The number of months before points expire, in
P[n]M RFC 3339 duration format. For example, a value of
P12M represents a duration of 12 months.
Points are valid through the last day of the month in which they are scheduled to expire. For example, with a
P12M duration, points earned on July 6, 2020 expire on August 1, 2021.
Example for 2 days, 12 hours, 30 minutes, and 15 seconds: P2DT12H30M15S