Since April 1, 2019, the new era name was announced for Japanese date Reiwa (令和). I came across few question by programmers regarding Japanese date and most of it was showing old era as not all user had updated their operating systems libraries. On April 25, Microsoft released packages for different Windows operating systems containing the updated registry key with the new era name. Update your device and check your registry to see if it has the new key, and then test your application. The Japanese calendar is divided into eras, and for most of the modern age of computing, system have been in the Heisei era; however, on May 1, 2019, a new era began Reiwa (令和). Because this is the first time in decades for an era to change, software that supports the Japanese calendar will need to be tested to ensure it will function properly when the new era begins. In the following sections, you will learn what you can do to prepare and test your application for the upcoming new era. ...