summer time

"summer time" finished, then I didn't know to change the time from today. how do I know about that? I think my teachers didn't tell us...or I didn't listen to the their explanation!? I had an appointment with friends today. we would promise to meet at 6:00 pm. but they didn't show up...becasue of my time! just I had got to the place early. I didn't notice about changed the time until we met. I think people feel gained today, but only I felt complcated...
one of my Japanese friends will be birthday, so we did birthday party tonight. we had succeeded about it. he was very pleased by it. I had good time with them^^ thanks

happy birthday!