Daylight Savings Time(Summer Time) Schemes These are all of the Schemes for changing of the GMT offset within different geographic areas. Some of these schemes will change frequently. The first column is one country that is using the scheme The seconds colum is the code for the scheme The third column explains the scheme NORTHERN HEMISPHERE * USA-Canada SSM-FSN Second Sunday March to First Sunday November * Mexico FSA-LSO First Sunday April to Last Sunday October * Europe LSM-LSO Last Sunday March to Last Sunday October European Summer Time Egypt LTA-LTS Last Thursday April to Last Thursday September Iraq FDA-FDO First day of April to the first day of October Israel LFM-TSS *changes every year* Last Friday March to First Sunday September SOUTHERN HEMISPHERE Namibia FSS-FSA First Sunday September to first sunday April Falkland Isls FSS-TSA First Sunday September to Third Sunday April Uruguay FSO-SSM First Sunday October to Second Sunday March Chile SSO-SSM Second Saturday October to Second Saturday March * Australia LSO-LSM Last Sunday October to Last Sunday March * AUS-Taz FSO-LSM First Sunday October to Last Sunday March * New Zealand FSO-TSM First Sunday October to Third Sunday March * Brazil TSO-LSF Third Sunday October to Last Sunday February * notes inclusion into ADMIN_adjust_GMTnow_on_leads.pl script