Need to use dates earlier than 1900 (Time library says out of range for dates < 1900)


I am currently using the calendar_grid library, which uses the Time library. My issue is that need to generate calendar grids before 1900 but the Time library does not support any dates before then. Is there anything I can do to extend or shift the date range supported by the Time library so that I can create calendars in the 1800's? Thanks in advance.