[masterzora]

A few explanations you can add for more-falsehoods.rst:

> 15. Unix time is the number of seconds since Jan 1st 1970.

The section you quote from Wikipedia shows why this one is false: leap seconds. Similar to how the number of hours between 00:00 and 3:00 in most of the United States depends on whether the timezone remains constant, springs forward, or falls back, the number of seconds between two Unix timestamps depends on how many leap seconds were inserted or deleted in that time frame.

> 16. The day before Saturday is always Friday.

This one is true only within the assumption but I'm not sure if the falsehood is literally false. When Alaska did the calendar change it had two consecutive Fridays (October 6th & 18th, 1867). This gives us the day after Friday not being Saturday but technically not the day before Saturday not being Friday. The falsehood still holds in spirit (outside of the assumption), of course, and it's possible somewhere else had it be true in practice as well.

> 27. The weekend consists of Saturday and Sunday.

The weekend differs across the world. Friday and Saturday is another popular one but Brunei gets a special shout out for having a Friday and Sunday "weekend" with Saturday being a working day.

> 59. DST is always an advancement by 1 hour

As far as I know, this is currently true if you aren't dealing with historical datetimes but Singapore will mess you up with historical data. They had a really odd case[1] where they went on DST by advancing 20 minutes and then ended DST without changing the clock at all.

[1] http://www.timeanddate.com/time/zone/singapore/singapore?sye...

[joncrocks]

Wikipedia suggests that there's an Australian island that still uses a half-hour DST.

https://en.wikipedia.org/wiki/Daylight_saving_time#Procedure