In general, trading on the global market is available from Monday till Friday, 24 hours a day, excluding public holidays.
In the summer, markets are traded from 21:00 Sunday to 21:00 Friday (GMT). In winter, trading is conducted from 22:00 Sunday to 22:00 Friday (GMT). Some tools are only available at certain times of the day. You can find out the trading time for each instrument, by clicking on the "Information" tab.