"When" is a useful app that allows you to quickly and easily calculate dates for various purposes. Whether you need to find out the current year in the Japanese era, your age, the zodiac sign, or the date that was two weeks ago, "When" has got you covered. No need to search the internet or look for a calendar anymore.

The app provides a simple and intuitive interface for inputting dates. You can easily switch between the Gregorian calendar, Japanese era calendar (Heisei, Showa, Taisho, Meiji), and the zodiac calendar. The app also supports OCR font-style numbers, making it easy to read and input dates accurately.

In addition, if you are using iOS 14 or above, you can add the "When" widget to your home screen. The widget displays the current Japanese era year, Gregorian year, zodiac sign, and a calendar for today.

"When" is a free app and does not contain any advertisements. It is a convenient tool for quickly calculating and referencing dates without the hassle of searching or flipping through calendars.