Answer
The forex market actually consists of many international markets around the world, including London, New York, Sydney, and Tokyo.

A specific country may have a holiday where traders in that country may take a break from trading; however, there are still traders in other countries who will continue trading, since their country doesn't celebrate that holiday.

Bottom line...although country-specific holidays may impact forex trading activity in terms of lower volume and higher volatility, they won't close down the forex market entirely. Trading still continues somewhere around the world.

do you know about the forex (4X) market?

My father recently started investing in this type of "money" market. its suppose to work off the changing value of international money.
Anyway I've never really been able to give him help on anything and thought maybe some of you knew some "tips", "tricks", "Advice". Anything I could pass along to him.

Answer
The Forex market is full of scammers and people who sell questionable investment products than make them rich and not you. I would advise your father against Forex trading. he is likely to lose money in the long run. Forex is useful to companies that make money in one country and need to exchange it for money in another country, but most individuals who trade Forex lose money.