Croatia becomes fully integrated EU member

Subject: International relations

Context:

At the stroke of midnight on Saturday, Croatia switched to the shared European currency, the euro, and removed dozens of border checkpoints to join the world’s largest passport-free travel area

More about news:

Croatia joined the EU in 2013, but to adopt the euro the country had to fulfill a set of strict economic conditions, including having a stable exchange rate, controlled inflation and sound public spending.
The Croatian kuna and the euro will be in dual use for cash payments for only 14 days and after that only EURO will be used.
Joining Europe’s ID-check-free Schengen zone means Croatian will now be among almost 420 million people who are free to roam its 27 member countries without passports for work or leisure.

What is Schengen Area:

The Schengen Area guarantees free movement to those legally residing within its boundaries. Residents and visitors can cross borders without getting visas or showing their passports. In total, there are 27 members of the Schengen Area.
European Union countries not part of the Schengen Area are Bulgaria, Cyprus, Ireland.
Four non-EU countries, Iceland, Liechtenstein, Norway, and Switzerland have adopted the Schengen Agreement.
Three territories are special members of the EU and part of the Schengen Area i.e the Azores, Madeira, and the Canary Islands.

Three countries that have open borders with the Schengen Area are Monaco, San Marino, and Vatican City.