How often to change your air filters can depend on the following: the type of air filter you are using; the overall indoor air quality; how many pets are in the home; the number of people occupying the home, and; the level of air pollution and construction around the home For basic 1-3 air filters, manufacturers usually direct you to change them every 30-60 days. If you suffer from light to moderate allergies, you could upgrade the air filter or change them [even more often|more frequently|every few weeks]3].
When we change our clocks. Most of the United States begins Daylight Saving Time at 2:00 a.m. on the second Sunday in March and reverts to standard time on the first Sunday in November. In the U.S., each time zone switches at a different time. In the European Union, Summer Time begins and ends at 1:00 a.m. Universal Time (Greenwich Mean Time).
Like most states in the USA, Daylight-Saving Time ( DST ) is observed in Pennsylvania, where the time is shifted forward by 1 hour to Eastern Daylight Time ( EDT ); which is 4 hours behind Greenwich Mean Time ( GMT-4 ). After the Summer months the time in Pennsylvania is shifted back by 1 hour to US Eastern Standard Time (EST) or (GMT-5). Current daylight saving dates for USA USA & Canada clocks are now on: STANDARD TIME. Standard Time began: Sunday 5 November 2017 02:00 local time. Clocks went back one hour. Standard Time ends: Sunday 11 March 2018 02:00 local time.