daylight saving time

- dikenali juga sebagai "summer time"

- the practice of temporarily 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

- diperkenalkan oleh Benjamin Franklin namun  William Willet yang mengemukakan idea ini secara serius dalam bukunya "waste of daylight" tetapi tidak mampu mendorong kerajaan britain utk menerima ideanya..

Benjamin said: 

"Early to bed, and early to rise, makes a man healthy, wealthy and wise"

- diperkenalkan secara rasmi oleh kerajaan German ketika perang dunia I

- digunakan  oleh kebanyakkan negara dan berbeza mengikut kedudukan

- one-hour shift occurs at 02:00 local time

- in spring the clock jumps forward from 02:00 standard time to 03:00 DST and that day has 23 hours

- in autumn the clock jumps backward from 02:00 DST to 01:00 standard time, repeating that hour, and that day has 25 hours.

- benefit:

1. save energy : delaying the nominal time of sunset and sunrise reduces the use of artificial light in the evening and increases it in the morning. As Franklin's 1784 satire pointed out, lighting costs are reduced if the evening reduction outweighs the morning increase, as in high-latitude summer when most people wake up well after sunrise.
2. economic effects : retailers, sporting goods makers, and other businesses benefit from extra afternoon sunlight, as it induces customers to shop and to participate in outdoor afternoon sports
3. public safety : reduction in traffic fatalities during DST, fire safety officials encourage citizens to use the two annual clock shifts as reminders to replace batteries in smoke and carbon monoxide detectors.
4. health : provides more afternoon sunlight for outdoor exercise. It alters sunlight exposure; whether this is beneficial depends on one's location and daily schedule, as sunlight triggers vitamin D synthesis in the skin, but overexposure can lead to skin cancer

- disadvantage:

1. complexity : people must remember to change their clocks; this consumes time, particularly for mechanical clocks that cannot be moved backward safely. People who work across time zone boundaries need to keep track of multiple DST rules, as not all locations observe DST or observe it the same way. The length of the calendar day becomes variable; it is no longer always 24 hours. Disruption to meetings, travel, broadcasts, billing systems, and records management is common, and can be expensive
2. politics : Daylight saving has caused controversy since it began

info buat kawan2 yang tak tahu apa tu daylight saving..masa first year terkejot bila senior pesan jangan lupe adjust jam.. bila dah lama2 baru faham kenapa.. bayangkan bila sun rises at 6 am instead 7am at usual.. jadi mereka pun nak maximise their day with the sun.. matahari terbenam pulak pukul 8 malam.. jadi mmg useful jugak diorang buat daylight saving ni, sebab bengkok la nak bangun subuh awal2..huhu..at least bila clock move 1 hour forward, dlm otak kita still bangun solat subuh pukul 6, so xdela awal sgt kan??

tp lame2 sun rises makin awal, jadi waktu solat subuh lama2 makin cepat n waktu isyak lama2 makin lmbat..

sekarang ni pertengahan spring waktu syuruk pukul 7.05am n waktu isyak pukul 9.07pm..

lama betul nk tunggu isyak..tp bersedialah, mengikut pengalaman masa 1st year, stay summer sebulan di nz dulu mmg masak tol..

isyak pukul 11, subuh pukul 3, syuruk pukul 5

aaaa...camna rakyat2 malaysia yg da menetap kat sini..diorg tak rasa susah ke.. kalau duduk malaysia, senang.. waktu solat constant sepanjang tahun, xyah nk pening2..huhu

oh lupa, daylight saving di NZ starts 26 september aritu..so time difference between NZ dan Malaysia sekarang jadi 5 hours..huhu

Michiko Pieces