CardExpiry

The month a payment card runs to, written 2028-12.

Use it beside a card's details on a payment form. For any other month, use YearMonth.

Shape

Example

CardExpiry { year: 2028 month: 12 }

text.parse(raw, as: CardExpiry) reads one from text that comes from outside. Text that isn't one at all fails malformed, such as 12/28, 2028-13 or 2028-00.

Good to know

• text.format shows it as a card prints it, 12/28, but text.parse reads only 2028-12.
• The card is good until the end of that month.
• == tells you whether two are the same, and < and list.sort_by compare and sort them.
• A field that holds one counts as personal data (financial), so you don't mark it yourself.

In JSON

A string, in a request, a response or json.write:

"2026-12""2028-01"

Details