ICS file extension. An ics file extension is used for calendar file format used by personal information managers and e-mail clients such as Microsoft Outlook, or Apple iCal. It is an universal format for transporting calendar data and events from one program to another.
Bury the hatchet. Meaning. To settle your differences with an adversary. Origin. The supposed language of Native Americans that we are familiar with is largely the invention of Hollywood scriptwriters - 'white man speak with forked tongue', 'kemo sabe' etc.
Although some believe this term comes from a Native American custom for declaring peace between warring tribes, others say it comes from hang up one's hatchet, a term dating from the early 1300s (well before Columbus landed in the New World). The word bury replaced hang up in the 1700s. See also: bury, hatchet.