Need the precise time for the forex trading week

After searching on the internet, I found that some told Forex trading period was Sunday 23:00 GMT-Friday 22:00 GMT, some others told it was Sunday 22:00 GMT-Friday 21:00 GMT.

1. How to understand it clearly?
2. If it's because of DST, what time is the precise time to switch? You know the DST switch time is different among different countries, different among Europe, Australia and Amercia.

Most common way of knowing is to convert the GMT into your specific time zone,for example if your time zone is EST ,you have to know the differential hours between these two time zones.Based on this you can calculate specifically and know where to switch.There are automatic time zone converters on the internet as well.

This page will help you: http://www.forexmarkethours.com/

Dear both, thanks. But you didn't catch my point especially for question 2. Could you please read it again and help support?
You can see I need a clear overall picture so that I can know how to switch precisely.

[quote=jollydragon;8436109]After searching on the internet, I found that some told Forex trading period was Sunday 23:00 GMT-Friday 22:00 GMT, some others told it was Sunday 22:00 GMT-Friday 21:00 GMT. 1. How to understand it clearly? 2. If it's because of DST, what time is the precise time to switch? You know the DST switch time is different among different countries, different among Europe, Australia and Amercia.[/quote

1. How to understand it clearly?
Per this example Sunday 23:00 GMT-Friday 22:00 GMT simply, the opening bell for the market is rung on Sunday 23:00 GMT on this time the market is opened for transactions ,likewise the closing bell is rung on Friday 22:00 GMT on which the market is closed for all Forex transactions for the week.

If it's because of DST, what time is the precise time to switch?
http://www.timeanddate.com/worldclock/converter.html
Hope this helps in finding the precise time to switch

In the Asian session, the organizations in Japan are open and will purchase and pitching currencies in order to work with organizations in different nations. There will be a high volume of yen being exchanged with the residential currencies of the enterprises that Japanese firms work with. At the point when Europe's organizations are open, at that point the euro is probably going to be traded in higher volume, because of organizations in Europe trading with organizations in different nations. During the evening, when their organizations are shut, they don't trade with different organizations outside of Europe and the trading action of the euro will be lower.