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Daylight Saving Time

A cache by potàfleurs Send Message to Owner Message this owner
Hidden : 03/25/2007
Difficulty:
3 out of 5
Terrain:
3 out of 5

Size: Size: small (small)

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Geocache Description:

[CZ] Kes venovana letnimu casu, ktery na nas zrovna nedavno opet uderil.
[EN] Cache dedicated to the daylight saving time which has struck us again recently.

Tato kes ma napomoci tomu, abychom uz znovu nebyli prekvapeni prichodem nebo odchodem letniho casu. Na uvodnich souradnicich kes nehledejte (nebo ano, chcete-li, ale neni tam). Pro nalezeni souradnic umisteni budete potrebovat zjistit par informaci z historie letniho casu a predevsim udelat si jasno, kdy ze se tento hlasi.

Prvni dokumentovana myslenka letniho casu (nebo cehosi podobneho) pochazela od Benjamina Franklina (tiskar, nakladatel, valecnik, statnik, diplomat, vynalezce hromosvodu, ...) a byla vyslovena v dopise nakladatelum Journal of Paris. Rok napsani dopisu oznacte A.

K prvnimu zavedeni letniho casu v praxi doslo v Evrope v roce, ktery oznacte B.

Nasledujici magická numera zakodujte vzdy z data, kdy se uskutecnuje prechod tak, ze mesic a den zapisete za sebe ve tvaru MMDD a vznikne tak ctyrciferne (pro mesice leden-zari vlastne trojciferne) cislo.

Zacatek a konec letniho casu v roce 2007 v Brne oznacte C a D.

V jedne casti Gronska se v terminovani letniho casu vyskytuje jista singularita - prechod je v sobotu. Prechody v roce 2007 v Nuuk (hlavni mesto Gronska) oznacte E a F.

Na jizni polokouli se veci maji trosicku jinak. Zjistete zacatek a konec letniho casu na vetsine uzemi Brazilie v roce 2007 - oznacte G a H. Tato dvojice pusobi nekterym hledacum problemy, proto na ni upozornuji. Na nejmenovanem specializovanem webovem serveru, ze ktereho nejspis budete cerpat, bo vas tam strycek Google dovede, maji pro tahle pismenka dva ruzne udaje - jeden dobre, druhy blbe. Potvory. Totiz konec DST je i v Brazilii v nedeli, nikoli v sobotu - pokud tedy jsem spravne zpraven.

A podivejme se take do budoucnosti: zacatek a konec letniho casu v roce 2008 v Brne oznacte I a J.

Celou tuhle taskarici s posouvanim hodinek by se samozrejme nesluselo podstupovat, pokud by neznamenala setsakra exaktne prokazatelnou usporu energie. Zjistete procento uspor energie diky letnimu casu v CR zaokrouhlene na dve desetinna mista, vynasobte 100, oznacte K.

Finalku hledejte na souradnicich
N 49° n/1000
E 16° e/1000

kde
n=2*(I-E)*F+(C-H)/(I-C)+K*(F+E-J-C)-B+A
e=H*I/(D-J)+(I-C)*(C-I)-D-B

Pri zapisu do elektronickeho logu prosim charakterizujte svuj vztah k letnimu casu.

[EN] To find this cache you will have to gather a few information from the history of DST and some beginning and ending dates.

The first documented thought of daylight saving time (or something of that sort) came from Benjamin Franklin and was expressed in a letter to the publisher of the Journal of Paris. Find out the year of this event, call it A.

The first practical application of the daylight saving time by several Europian governments happend in a year which should be called B.

The following magic numbers are encoded from dates of transition to or from the DST, by concatenating the month and day numbers as MMDD. That yields a four-digit (or three digit for January to September) number.

The DST start and end dates in 2007 in Brno call C and D.

In one part of the Greenland there is a singularity in the DST start and end dates - the transition is on Saturday. The DST start and end in 2007 in Nuuk (the capital of Greenland) be called E and F

In the southern hemisphere the situation is a bit different. Find out the DST start and end in Brazil (most locations) in 2007, call them G and H. This couple causes trouble to some cachers. An unnamed specialized server which you will probably be using, as uncle Google will bring you there, has two different values - one right, one wrong. Loosers.

And let us also look into the future: the start and end of the DST in 2008 in Brno be called I and J.

This whole practical joke with time shifting would not be undertaken if it did not mean damned exactly proven energy savings. Find out the percentage of energy saved thanks to the DST in Czechia, rounded to hundredths, multiply by 100, call it K.

The final stage should be looked for at
N 49° n/1000
E 16° e/1000

where
n=2*(I-E)*F+(C-H)/(I-C)+K*(F+E-J-C)-B+A
e=H*I/(D-J)+(I-C)*(C-I)-D-B

When logging to the electronic log, please express your opinion on the DST.

Az spoctete souradnice finalky, dobre si promyslete, odkud k ni pujdete. Jsou cesty horsi a cesty lepsi (jak o tom svedci i logy). Nejlepsi je cesta od Wilsonova jezera:

Kazdopadne neni potreba vydavat se do mist s terenem 4* a 5* a muze to byt nebezpecne, tak nic takoveho nepodstupujte - OPRAVDU TO NENI POTREBA. Za deste vznika na cesticce blato a podle podrazek a sikovnosti pak terenni hodnoceni kolisa - jestli muzete, volte navstevu za sucha.

Additional Hints (Decrypt)

20pz fxiven i uyvarar fgrar cbq xrerz
20pz fpne va n zhq pyvss haqre ohfu

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)



 

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