Croatia has switched to the Euro and entered Europe's passport-free zone - two major milestones for the country after joining the European Union nearly a decade ago.
At midnight (23.00pm on Saturday Irish time) the Balkan nation bid farewell to its kuna currency and become the 20th member of the Eurozone.
It is the 27th nation in the passport-free Schengen zone, the world's largest, which enables more than 400 million people to move freely around its members.
Experts say the adoption of the Euro will help shield Croatia's economy at a time when inflation is soaring worldwide after Russia's invasion of Ukraine sent food and fuel prices through the roof.
But feelings among Croatians are mixed.
While they welcome the end of border controls, some worry about the Euro switch, with right-wing opposition groups saying it only benefits large countries such as Germany and France.
"We will cry for our kuna, prices will soar," said Drazen Golemac, a 63-year-old pensioner from Zagreb.
Many Croatians fear that the introduction of the Euro will lead to a hike in prices - in particular that businesses will round up price points when they convert.
For tourist agency employee Marko Pavic, "Croatia joins an elite club".
"The Euro was already a value measure - psychologically it's nothing new - while entry into Schengen is fantastic news for tourism," he told AFP.
Use of the Euro is already widespread in Croatia.
Croatians have long valued their most precious assets such as cars and apartments in Euros, displaying a lack of confidence in the local currency.
About 80% of bank deposits are denominated in Euros and Zagreb's main trading partners are in the Eurozone.
Officials have defended the decision to join the eurozone and Schengen, with Prime Minister Andrej Plenkovic saying that they were "two strategic goals of a deeper EU integration".
Croatia, a former Yugoslav republic of 3.9 million people that fought a war of independence in the 1990s, joined the European Union in 2013.
"The Euro certainly brings (economic) stability and safety," Ana Sabic of the Croatian National Bank (HNB) told AFP.
Experts say the adoption of the Euro will lower borrowing conditions amid economic hardship.
Croatia's inflation rate reached 13.5% in November compared to 10% in the eurozone.
Analysts stress that eastern EU members with currencies outside of the eurozone, such as Poland or Hungary, have been even more vulnerable to surging inflation.
As some Croatians lamented the demise of the national currency, HNB governor Boris Vujcic said while it was a sentimental moment for him, it was the "only reasonable politics".
The kuna was adopted in 1994, during the independence war.
Kuna means marten, a weasel-like carnivore whose fur was used as currency in the Middle Ages.
Today Mr Vujcic will symbolically withdraw Euro from a cash machine in downtown Zagreb.
Interior and foreign ministers will attend brief ceremonies at border crossings with Croatia's EU peers Slovenia and Hungary respectively while the bloc's chief Ursula von der Leyen is to visit the country.
Local papers hailed the two events, with the best-selling Vecernji List daily labelling them the "crown of (Zagreb's) EU membership".
In recent days customers queued at banks and ATMs to withdraw cash, fearing payment problems during the immediate aftermath of the transition period.
Croatia's entry into the Schengen borderless area will also provide a boost to the Adriatic nation's key tourism industry, which accounts for 20% of its GDP.
Previously long queues at the 73 land border crossings with Slovenia and Hungary will become history.
Border checks will only end on the 26th of March at airports due to technical issues.
Croatia will still apply strict border checks on its eastern border with non-EU neighbours Bosnia, Montenegro and Serbia.
The fight against illegal migration remains the key challenge in guarding the EU's longest external land border at 1,350km.