The Year 100 problem (also known as the Y1C problem, Y1C Bug, and Y1C) was a problem. It happened because some early computer programs of Taiwan were made to handle only years containing 2 digits of the Minguo calendar system, and people started fearing that date-related processing would happen incorrectly for dates and times after December 31 2010. The event caused a big concern that very important industries (such as electricity or financial) and government functions would stop working at exactly midnight, January 1 2011, and on other critical dates which were called "event horizons".