Normally, during the European and North American winter time, weekly activity begins on Sunday at 22:05 GMT continuously until Friday 21:00 GMT. During the Day Light Saving times in these regions, the weekly market activity begins on Sunday at 21:05 GMT and ends on Friday at 20:00. Market activity hours may vary due to public holidays or due to unusual liquidity conditions which may arise from exceptional global events. Opening or Closing times may also be altered by iFOREX due to liquidity and risk management considerations. Please be advised that while some of the instruments are traded on a 24 hour basis without interruption, some instruments, mainly shares and indices, have special Trading Hours.