The flag shows the country the number is parsed as. It appears after 4 national digits, or as soon as a country code is typed (e.g. +44), and follows the number's country.
Option 1
Option 2
Option 1
Option 2
Expand an organization, choose a calendar, then collapse it. The selected calendar stays visible. The first example starts with Design Talks selected. Reading Room is its organization's only calendar, so it appears at the top level. Makers and West Coast Collective show their shared plan on the organization; Atelier has mixed plans.