北京问日科技有限公司是国内最早、最专业的日历软件开发商。公司自2008年成立至今，一直致力于为全球个人及企业提供最优质的日历软件服务。目前，公司旗下已有以“365日历”为核心的系列日历产品。

    “365日历”作为目前国内最专业的日历软件，提供手机版（iOS、Android）、PC版、WEB版等全平台服务。在满足用户公历、农历、万年历等基本需求的同时，还采用先进的云数据同步技术为用户提供包括日程管理、图片日程等实用功能。2013年公司率先推出极具创新的公众日历和群组日历功能，首次将生活信息整合进日历服务，形成了以公众日历为依托、据有自建日历、群组讨论和评论功能的日历平台。目前，365日历各平台累计用户超过1亿。

    每天，数以亿计的用户使用我们的日历服务，用户的需求更激励我们不断完善产品功能，打造最适合中国人使用的日历产品。我们将继续不懈努力，用日历丰富每天生活，用心改变你我世界。


Brief Introduction
When Co., Ltd is the earliest and most professional calendar Application software developer in China. Since its establishment in 2008, the company has been devoted to providing top-quality calendar Application software service for individuals and enterprises worldwide. Now the company has owned a series of products with 365 calendar at the core.

As the most professional calendar Application software 365 calendar provides all-platform services through mobile phone (with iOS or Android), PC, Web and other media. It not only meets users’ basic requirements on Gregorian calendar, lunar calendar and perpetual calendar, but also provides practical functions like schedule management and schedule picture by cloud computing data synchronization technology. In 2013, the company launched two innovative functions—public calendar and group calendar, which integrated the life information into the calendar and formed a platform based on the public calendar with functions of building one’s own calendar, group discussion and comment. Now the users of all the 365 calendar platforms have surpassed one hundred million.

Every day, hundreds of millions of people are using our calendar services. Their demands stimulate us to improve the functions of our products and make the most convenient calendar for everyone. With our unremitting and attentive efforts, we hope to enrich everyone’s life and change the world with 365 calendar.