"This site uses client-side scripting"

This site uses client-side scripting

+ 5 Jun 2025 - Spooky, scary JavaScript update. +
+

+ + Jerry about to be eaten by Tom +

+ I have a few thoughts on client-side scripting. It was only recently that + I decided to burden your browsers with up to 2.9 kilobytes of JavaScript + code per page[*]. My previous zealotry of avoiding + it was based on privacy and security concerns that I have with this + technology, which I didn't want my few readers to deal with. So, let me + explain why I decided to burden your browser with a code size of a photo + taken with a Nokia 6600. +

+ The sheer concept of running served code locally in your browser is alien + to me. Sandboxed or not, escapes happen on a large scale. Just this week, + the zero-day vulnerability + CVE-2025-5419 + was documented after having existed for almost half a year in the wild. Last + year, four severe vulnerabilities in the JavaScript engine emerged that + I am aware of, one of which enabled ACE with as little as 40 lines of code + (including the payload!). +

+ Running code client-side means placing a lot of trust in your source (the + website) but even more in the tool (the browser). My decision to include + JavaScript in the non-critical functionality of the site was made for the + comfort of average surfers. To be specific, now visitors can see my + mars clock + update in real time. I wanted to demonstrate the difference between a Mars + second and an Earth second in the simplest possible example. +

+ The core functionality is, and always will be, executed server-side. All + scripting is purely cosmetic and in no way interferes with your experience + on my domain. +

+ But don't take my word for it. I encourage every visitor to read my source + code. Up-to-date "backups" are stored on my Git server and linked in every + footer. Compare them with the dev console and call me out if you find any + discrepancies. If you don't feel comfortable diving into the code, fire up + JShelter + to protect yourself. Even better, I encourage you to disable all JavaScript + and fetch only my + RSS feed. +

+ Remember, a web publication should be obtained from the server in its complete and + unaltered form. If someone hides information behind potential security risks, + it might not be worth your time. +

+ + + + +
+

+ +
+ * If we include the license statements, which don't affect the logic of mentioned code, + it adds up to 5 kilobytes per page. +
+ +
+

Mars clock

+ Ack Ack Ack Ack Ack! +
+
It was my friend Peter who got me into timekeeping "nerding". He is a devoted fan of Mars colonization and author of few articles about timekeeping on other celestial bodies. He inspired me to make a simple app to help me (and you!) to see what time it is on other places in our Solar system. -

+

+
+

 
-------------------------------------------------------
-Earth                  |  Time   |       Date        |
-------------------------------------------------------
-Silicon Valley         |    |    |
+---------------------------------------------------------
+Earth                  |    Time    |       Date        |
+---------------------------------------------------------
+Silicon Valley         |    |    |
 Boston                 |    |    |
 London*                |    |    |
 Tokyo                  |    |    |
+
 
-------------------------------------------------------
-Mars                   |  Time   |       Date        |
-------------------------------------------------------
-Jezero Crater          |    |     |
+---------------------------------------------------------
+Mars                   |    Time    |       Date        |
+---------------------------------------------------------
+Jezero Crater          |    |     |
 Gale Crater            |    |     |
 Olympus Mons*          |    |     |
 Tharsis Tholus         |    |     |
 Conv. Prime Meridian   |    |     |
-
-
-
-------------------------------------------------------
+


+---------------------------------------------------------
 * 0 offset time zone
-            

-
-      

-      
+

The idea was to create the most humanly readable modification of the - Darian calendar +Darian calendar On contrary to the original, the epoch starts on UTC 00:00 11th April, 1609 (invention / first use of telescope) with year 1, not year 0. Aditionaly, the time zone with zero offset was chosen not conventionally (the first landing spot / prime meridian) but rather by matching the converted time with actual daylight on the Red Planet. -

Note, that original Darian calendar designates the first day of each month as the start of a new week, which results in a one-day weekend occurring three or four times a year. I am uncertain how this would be received by future Martian colonists, so I didn't implemented this feature as well as winter/summer time shifts or any holidays whatsoever. -

- Also, the clocks are not updating automatically like clocks usually do, - because I didn't want to DDOS myself nor invade your client with - any scripting. It is also not very useful extraterrestrially, +

+ Also, this site is not very useful extraterrestrially, so I made a portable version which you can fit on your Raspberry Pi or any device running Java. It runs in GUI mode and terminal as well. -

- Download +

+Download (12.7kb) / - Source code - -

-
-
-

- +Source code +

+
+
+
+ What about other celestial bodies in the Solar System? All relatively good + colonization candidates have a problem adopting a customized timekeeping + format due to their vastly different synodic rotation periods compared to + that of Earth. Homo sapiens are biologically programmed to function on a + 24â26-hour day. Therefore, it is much easier to implement the classic + Gregorian calendar with a 24-hour day and disregard the actual daylight + period (especially since the thin atmospheres and natural luminous intensity + would require artificial lighting anyway). +
+
+ However, it is important to keep track of local daylight duration for technical purposes, + such as photovoltaic system management, energy conservation during spacewalks, + or monitoring surface temperature. Nasa is actually working on their custom timekeeping format + for future Moon missions. You can read more about it +here. +
+

+
+
+ Mars clock is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE like aerospace engineering, tax payments and/or time travel. - -
-
-

Giyo tagab

+ Sit ac is erken in! +
+
+ Abe rokab ela + David + ud al ela Ro ro robit + iv abe rabali web biza. Ab neli vev ag uyid gizit, ub + avit ab vev, ag gizit hek camib cid iv abe ladup ta. + Ac eluk relidek ay iv abe ugz, abe uyil lajog git ramibaf + ur ac aluk eca alid ud dotac al cednob.

+ + cool dancing alien

+ +

+ Ab neli vev sicu jivabz, alif uf ac hib col ir ab, + ac elul vev E-pipac. Ab rur abe pipac-pejab lacik gizit + alif ab fafac kimerem in zab taf. + Rek ladup eb vev abaque GPG patab rubigeb ace pipalz. +

+ email@dpolakovic.space + + Kalibev abe GPG patab + + (Avif vev GPG petab?) + +

+
+

+ + + +

+ +

+ +
+