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.
bury one's head in the sand. - to ignore a problem or hide from some obvious danger, to refuse to see or face something. My uncle buried his head in the sand and would not talk about the family problem. butt heads with (someone) - to argue with someone about a particular subject or problem.