The day marks the feast of St. Andrew, Scotland's patron saint, and is also the nation's official flag day. The Scottish flag, known as the Saltire or Cross of St. Andrews is flown from buildings across the nation.
Although people in Scotland have celebrated St. Andrew as their patron saint for centuries, it wasn't until 2006 that St. Andrew's Day was officially declared a public holiday.
Traditionally, Scots celebrate the holiday with feasts of haggis ( savory pudding containing sheep's heart, liver and lungs), neeps (rutabaga or swede), and tatties (potatoes) alongside parades, dances and festive music.
Google's doodle pays homage to Scotland's pristine beauty, illustrating the flag as it's hoisted amid scenes of the country's famous landmarks: Cuillin Hills, Ben Nevis, Broch of Mousa, Isle of Skye and Loch Lomond.