For example, track the first time an episode airs in the US, when that episode has already aired in the UK earlier.
This is now possible for the following countries:
* United States
* United Kingdom
* Canada
Additional countries can be considered if there is sufficient demand.
For an example, see https://www.tvmaze.com/alternatelists/19/his-dark-materials-united-states-country-premiere
For more background info, read https://www.tvmaze.com/threads/4508/architecture-for-alternate-airdates and for the exact policy, refer to https://www.tvmaze.com/faq/40/alternate-episodes :)
Additionally, alternate airdates can now be included in the schedule and calendar! Head to https://www.tvmaze.com/dashboard/preferences to enable the preference :)
(This is a TVmaze premium feature for now)