Because sunrise would be really late in the winter, when the daylight hours are shorter. When the choices are to have daylight from 7:40 am to 5:00 pm on standard time or 8:40 am to 6 pm on DST, many people prefer standard time. read more
Seasoned followers of daylight saving time will remember the United States went to year-round DST for a brief period in the 1970s. The Emergency Daylight Saving Time Energy Conservation Act of 1973 was put in place during the oil embargo crisis. read more
Daylight Time Savings can not be kept all year round because of four seasons in a year. The origin of daylight saving is based on winter months when sunshine is mostly experienced in the evening. I think, If this is done in summer for example, then the meaning of DST would change to Night Time Savings. read more