778 Matrix PRASAR UCS System Manual
Daylight Saving Time (DST)
What's this?
Daylight Saving Time (DST) is the practice of advancing clocks so that afternoons have more daylight and
mornings have less. Typically clocks are adjusted forward one hour near the start of spring and are adjusted
backward in autumn.
Many countries of the world use DST, though the start and end dates of DST vary with location and year. Even
within countries, uniform DST may not be observed. For example the states of Arizona and Hawaii do not observe
DST. Certain countries may observe DST in certain years, for instance Guatemala, while in most countries of Asia
and Africa, and in certain countries of South America, DST is not observed at all.
When PRASAR UCS is installed in a country/region where DST is used, it is necessary to synchronize the Real
Time Clock of PRASAR UCS with the local time.
So, if you are installing PRASAR UCS in a country where DST is used, find out the DST convention currently in use
in that country, and adjust DST accordingly.
How it works
The forward and backward adjustment of clocks can be Scheduled or Manual.
• Scheduled DST Adjustment: The Real Time Clock of the PRASAR UCS is advanced and set backward
automatically according to the DST convention of the country/region where the PRASAR UCS is installed.
Scheduled DST Adjustment is useful in countries/regions where DST Time is fixed, such as in Europe,
USA and Canada, without yearly variations.
The table below gives describes the DST conventions followed in the different countries for which
PRASAR UCS will automatically adjust DST.
PRASAR UCS supports 18 DST Types for Scheduled DST Adjustment.
DST
Type
DST Timings
Applicable in Countries
Start Time End Time
01 Last Sun MAR
From 01:59 to 03:00
Last Sun OCT
From 02:59 to 02:00
Austria, Poland, Russia, Spain
02
Last Sun OCT
From 01:59 to 03:00
Last Sun MAR
From 02:59 to 02:00
Australia, Australia-Tasmania, Belgium,
France, Germany, Greece, Hungary, Italy,
Sweden, Switzerland
03 Second Sunday MAR
From 01:59 to 03:00
First Sunday NOV
From 01:59 to 01:00
Bahrain, Mexico, Turkey, United States
04 First Sun NOV
From 23:59 to 01:00
Third Sun FEB
From 23:59 to 23:00
Brazil
05 Second Sunday MAR
From 01:59 to 03:00
First Sunday NOV
From 01:59 to 01:00
Canada
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