Where does the phrase glad rags come from?

The phrase "glad rags" originates from the early 20th century and is believed to be a colloquial term used in British English. It refers to fancy or stylish clothing worn for celebrations or special occasions, with "glad" indicating happiness and "rags" playfully referring to clothes. The term gained popularity in the 1920s, often associated with the vibrant fashion of the time. It has since become a lighthearted way to describe dressing up or putting on one's best attire.