Who celebrates the new year first and last? It's complicated.

Each day starts at the international date line. But countries are free to observe time as they see fit—resulting in a number of calendar quirks.

Australia and Oceania

Martin Burch (@seecmb) / X

In the News UCLA Samueli School Of Engineering

Time National Geographic

Amy Mckeever's Instagram, Twitter & Facebook on IDCrawl

15,000-year-old Idaho archaeology site now among America's oldest

Khara Khoto Article, Black City Information, Alashan Plateau Facts -- National Geographic

Australia and Oceania

In the News UCLA Samueli School Of Engineering

Amy Mckeever's Instagram, Twitter & Facebook on IDCrawl

In the News UCLA Samueli School Of Engineering

Oceans National Geographic

Riley D. Champine (@rileydchampine) / X

Martin Burch (@seecmb) / X