A method, system, and apparatus are provided for converting dates between calendars and languages. When a string of text is entered into an application program, the string is analyzed to determine whether the string of text includes a date. If the string of text includes a date, the date is semantically labeled with schema information that identifies the calendar and language used to express the date. When a selection is received of the date or an indication that the date is labeled with schema information, a list of actions may be provided identifying conversion options available for the date. One of the conversion options may then be selected resulting in the conversion of the selected date to the calendar and language identified by the selected action. The converted date may then be inserted into the string of text to replace the selected date.