even ozone, to form a wide variety of toxic products, some of which may cause biological mutations. Examples of these chemicals include the nitrate radical, nitroarenes, and nitrosamines. Visibility Impairment - Nitrate particles and nitrogen dioxide can block the transmission
In the U.S., the clocks will be turned back one hour on Nov. 2, at 2:00 a.m. local time, so trick-or-treaters will hang on to a little more light on Halloween. (Mark your calendar, we âspring aheadâ an hour on the second Sunday in March.). If you live in Europe, you will have already moved your clock back to Standard Time on Sunday, Oct. 26, in the wee hours of the morning (it varies by country), in Asia, most countries do not observe Daylight Saving.
Alan Wilson, Director of James Ritchie & Son clockmakers, founded in 1809, adjusts a clock face to British Summer Time on March 26, 2010 in Edinburgh, Scotland. (Jeff J Mitchell/Getty Images) This Sunday, March 12, 2017, is when clocks âspring forwardâ to make way for an âextra hourâ of daylight for daylight saving time in the United States. What time do clocks change? Daylight saving time is a set calendar date. It is always the second Sunday in March and begins on Sunday, March 12 at 2 a.m. When the clock strikes 2 a.m., it âspringsâ forward to 3 a.m. for a majority of the United States. This easy to remember because when daylight saving time ends on November 6 this year, clocks âfallâ backward for autumn.