Do password reset requests and user activation emails expire?

What are the time periods that Password Resets and Activation Emails expire?
  • Activation emails expire after 24 hours. After expiration, the Admin on the account will need to resend the activation.
  • Password reset links also expire after 24 hours (change introduced in the Winter '16 Release Oct 2016).
Keywords: Password Reset, User Activation, Expiration