I understand that it was more like everyday A/B testing of the calendar adjustment because booking seems to be very data-driven - developers work on teams that

I understand that it was more like everyday A/B testing of the calendar adjustment because booking seems to be very data-driven - developers work on teams that are assigned to the specific area of the web-site, or even the specific target groups(honey mooners, business traveller, etc.) and try new features/adjustments by using A/B testing.