Finance Related

I want to know xau/usd TRADING TIMING / SESSIONS. When it opens, when it is closed, for how much hours it is closed (on daily basis), which days are holidays of its trading (weekly) etc.

Secondly, is there any CALENDAR showing (a) important fundamental news – day by day (b) option expiry / future last trading day etc.

Any other thing which must keep in mind while trading.

Thank you for your time and help.