It was just another weekend for us as we cuddled in our cozy sofa watching classic movie of Kamal Hassan, Michael madana kamarajan!! It was around 1:50 am and we still had an hour to go for CSK match ( Both being a cricket fanatic were waiting for the match to commence). Within few minutes we were shocked to realize that the time was 3:00 AM!! We were horrified.. and then we realized the fact - daylight saving has just started!!
So what is Daylight Saving Time??
Literally speaking, Daylight saving time (DST) or call it as summer time, is the practice of advancing clocks during summer months (that feature more daylight) so that people get up earlier in the morning and experience more daylight in the evening.Most part of the world follow this practice of DST which was proposed way back in 1895. The world which is farther than equator experiences more cold and less sunshine. In these region people are desperate to enjoy the sunshine more than anyone. So they came up with this idea of shifting the clock by an hour during summer so that they can experience sunlight more. This idea also has a argumentally another important advantage of saving the electricity.
Procedure:
As the famous mnemonic goes "Spring Forward, Fall Back!" In New Zealand, during spring one-hour shift occurs at 02:00 am local time, the clock jumps forward from the last moment of 01:59 standard time to 03:00 DST and that day has 23 hours, whereas in autumn the clock jumps backward from the last moment of 01:59 DST to 01:00 standard time, repeating that hour, and that day has 25 hours.
Purpose:
To understand the depth of the purpose of this confusing idea, me and my husband had a brainstorming discussion at that wee hour!
Lets take a scenario, Assuming that the sun rises at 6:00 am and sets at 6:00 pm during normal days. Now during summer season, we all know that sun stays for longer than normal days and assuming that the sun rises at 5:00 am and sets at 7:00 pm during this season. According to DST, Spring forward.. so they forward the clock by an hour.. so during DST days the sun rises at 6:00 am ( 5:00 am has been forwarded by an hour!) and sets at 8:00 pm (7:00 pm has been forwarded by an hour!). This means that we get longer time to spend outside in the sunlight before it darkens. This also means that as usual the day breaks at 6:00 am! Technically the daylight is not increased because of this shift, just the utilisation of the sunlight is made effectively!
The same procedure goes during winter. They reverse the clock by an hour (remember "fall back!"), so that they can return to home before it darkens.
For more detailed explanation : http://en.wikipedia.org/wiki/Daylight_saving_time
Conclusion:
Whether this shift has been beneficial or not still remains as a dispute but it has certainly not been useful to those who schedule meetings around the world and to all those programmers who have to calculate these complicated timings across the world to get their code working.
I hope I have added more confusion to this already confused procedure!! Catch you all later with another confusing post. :)



















