1800s

The converted code will be able to handle dates that span centuries (1800s, 1900s, and 2000s at least).

Source: wiktionary

The largest owner of tea lands on the island in the late 1800s (and Taiwan’s single wealthiest family) were the Lins of Pan-ch’iao. Along with other great familial and corporate landowners, the Pan-ch’iao Lins drew income from renting their properties under a flexible, sophisticated contractual system of land tenure.

Source: wiktionary

In the early 1800s, Charles Fourier, a Frenchman, proposed, in a series of jargon-filled writings, a self-sufficient community model called a “phalanx.” […] By the mid-1800s, more than 15,000 Americans had experimented with Fourieristic living, many drawn to its promise during a severe economic downturn.

Source: wiktionary