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Unless you're someone's physician you can't really make an assessment that would allow you to determine if someone is intellectually disabled, so don't use it as an insult.
Ask HN: What does 12:00 AM mean?
151–160 of 221 posts
Re: Ask HN: What does 12:00 AM mean?
#152Earlier quoted context omitted.
What’s the difference? In both the 12 and 24 hour system the clock rolls over at the end of the period, and the period starts.
The difference is that in 12-hour system, the rollover point is ambiguous and non-intuitive (11 PM -> 12 AM -> 1 AM), while in 24-hour one it's perfectly clear and obvious.
Re: Ask HN: What does 12:00 AM mean?
#153Did you get to take your test?
Re: Ask HN: What does 12:00 AM mean?
#154Re: Ask HN: What does 12:00 AM mean?
#155You have to learn other cultures' norms if you want to live or work with them. It goes both ways. Europe and America do not only time differently, but phone numbers (1-800-123-1234 in the USA, 06 86 57 90 14 in France), dates (Jan 1 1911 would be 1/1/11 in the USA, 11-1-1 elsewhere), decimals (1,000.00 or 1.000,00), units (inches vs centimeters), reading order, daylight savings time, time zones (some countries don't…
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Except for times and angles (only the second and the radian are SI). Also, aviators everywhere outside of PRC and North Korea use feet and flight levels (hundreds of feet) for altitude, and navigators (in the air and at sea) use nautical miles and knots. Other widely used non-metric units include mmHg for pressure, AU and parsec for astronomical distances, and eV for energy.
Re: Ask HN: What does 12:00 AM mean?
#156Re: Ask HN: What does 12:00 AM mean?
#157Earlier quoted context omitted.
The difference is that in 12-hour system, the rollover point is ambiguous and non-intuitive (11 PM -> 12 AM -> 1 AM), while in 24-hour one it's perfectly clear and obvious.
I find the 12-hour system as intuitive as the 24-hour system. It is centered around noon, where "AM" means time on the same day before noon, and "PM" means time after, on the same day. Nothing wrong with that.
Re: Ask HN: What does 12:00 AM mean?
#158Imagine if 12AM meant 12 noon. What would one second past 12 noon be? It'd have to be 12:00:01 PM. Even one millisecond past 12 noon would be PM. So "12AM" could only exist for an infinitesimal length of time, in contrast to 11AM, 10AM etc. which each last for an hour.
Re: Ask HN: What does 12:00 AM mean?
#159You have to learn other cultures' norms if you want to live or work with them. It goes both ways. Europe and America do not only time differently, but phone numbers (1-800-123-1234 in the USA, 06 86 57 90 14 in France), dates (Jan 1 1911 would be 1/1/11 in the USA, 11-1-1 elsewhere), decimals (1,000.00 or 1.000,00), units (inches vs centimeters), reading order, daylight savings time, time zones (some countries don't…
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Many Americans would use standard _given the opportunity_. Nothing here was ever converted, or has the same availability in metric so things continue on as they always have. Very few defend them as better, especially distance measurements.
Claiming there is a "better" system for dates is just preference. Why does it make sense to list the year first, it only changes once every 365 days?
Re: Ask HN: What does 12:00 AM mean?
#160Earlier quoted context omitted.
What’s the difference? In both the 12 and 24 hour system the clock rolls over at the end of the period, and the period starts.
The difference is that in 12-hour system, the rollover point is ambiguous and non-intuitive (11 PM -> 12 AM -> 1 AM), while in 24-hour one it's perfectly clear and obvious.
How is that different than 11 -> 12 > 1 ?
Yes I get it that in normal integers, 1 is not after 12, but neither is 0 after 23.