>>353497203
Simplistic answer is that most of Northen America (excluding Greenland and Mexico) start it on the second Sunday of March and end it on the first Sunday in November, whereas Europe(and Greenland) start it on the last Sunday of March and end it on the last Sunday of October! I might be wrong but I think the anon you replied to is a kiwi, seeing as how their DST starts on the last Sunday of September. 
I hate having to keep up with daylight savings so much, thank God most of it is automatic nowadays