Initialization 初始化 https://github.com/nicksnyder/go-i18n/tree/master/v2/example.

https://github.com/go-playground/validator/blob/master/_examples/simple/main.go.

https://www.jianshu.com/p/e30f299f7b6c Date formatted to days 日期格式化到天.

https://www.jianshu.com/p/e30f299f7b6c Date formatted to seconds 日期格式化到秒.