I recently was invited to create a Careers profile (I'm flattered, by the way).
On Monday, the 29th of October, I received the invitation, saying
[snip flattering stuff about my contributions and Careers] But please act soon: this invitation expires in 14 days, ...
(Emphasis is mine.)
I didn't act swiftly, so today, Monday the 5th of November [Remember, remember ...] I received the following reminder:
We noticed you have not accepted our invitation to join Stack Overflow Careers. Only 3 days remain before it expires, and we’d love to have you.
(Emphasis is mine again.)
Thank you for the flowers, and I acted before Careers decided that maybe
3 - 1 = 0, but somebody should take a look at the code for calculating how many days the invitation remains standing.