Time-keeping is for all methods to measure time. For example, questions about the hourglass, the sundial, and atomic clocks all fit into "Time-keeping"

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How did ancient Dravidians tell the time?

Before the invention of clocks people used devices such as sundials, sandclock etc to know the time. Wikipedia gives you the measurements once used by south Indians (time,area, weight). My doubt is ...
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1k views

Why does Edinburgh Castle's one o'clock gun fire at 1pm instead of, say, noon?

Curious to know if there is a specific reason they fire it at 1pm. Noon would make more sense to me!
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When did the Arabic numerals appear on clock faces?

Were the Arabic numerals used in pre-modern times on mechanical clock faces? Is there a specific point in time when they started to replace Roman numerals? Edit: Wikipedia article for Clock face ...
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2answers
213 views

What is the earliest written date?

What is the earliest written date found? When I say "date" I primarily mean a date in the Gregorian calendar (perhaps the calendar-year is most interesting). It could also be interesting to know ...
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55 views

Are there documented shifts in how history, time, and accuracy were regarded in society? [closed]

I recall an interview where Reza Aslan described that History, in its present form, didn't always exist that way. That is the rigor, validation, and peer review wasn't present. Instead, it was a ...
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3answers
427 views

How was the current month and day disseminated to the townspeople of Medieval Europe?

How was the current month and day disseminated to the townspeople of the Medieval Europe? I'm quite sure that personal calendars weren't a thing back then... but I could be wrong... If they had a ...
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1answer
144 views

sense of time in people with no means for time measurement

How did early, e.g. ancient to early medieval times, people have a sense of time, i.e. an hour, with no clocks around? I am aware that mechanisms for time measurement existed, sundials, water clocks, ...
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253 views

Time zones in USA

Time zones are demarcations of solar hours (15 degrees) on the planet (a few are offset by 30 or 45 minutes) used by many nations. Solar noon moves closer on average (depending on the month and day) ...
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Why did the clocks go back in Shanghai on December 31, 1927?

If you are a Stack Overflow user you may already have read Jon Skeet's excellent answer that discusses a time zone change at the end of 1927 in Shangai, when the clocks went back for 5 minutes and 52 ...
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1answer
595 views

in what form did William the Conqueror write the date of his own coronation?

This is a question about the English legal calendar as viewed by people living at the time, not as historians recorded it later. New year shifts to 1-January To the best of my understanding, the ...
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3answers
182 views

Who first precisely measured the length of the year?

In the past people measured the length of a year according to the moon's 28-day cycle but this obviously left a few days out, so I was wondering which civilization first realized this and fixed the ...
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5answers
340 views

What was the Julian Calendar aligned to?

I understand that the Julian Calendar was introduced to align the length of the calendar to the tropical year, i.e. make the average year 365.25 days long. However, what I'm still trying to figure out ...
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2answers
391 views

What is the earliest reliably dated event exact to the year?

How far does reliable counting of the years reach into the past: with the help of dating methods? using only primary sources?
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What is the origin of Indian weekday names?

The days of the week in several Indian languages are named after the same planets/gods as the Graeco-Roman days of the week. Did these arise from some common source predating both (PIE?), or was the ...
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2answers
3k views

Why is Spain's base timezone UTC+1?

Looking at the time zone map on Wikipedia we can see that countries such as France and Spain technically should have a time zone of UTC+0. Wikipedia says: France previously used GMT, but was ...
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1answer
419 views

Farming societies without calendars

Were there ever any farming societies without a calendar? For example, the Egyptians had a calendar to help them know when to plant and when to harvest. The ancient Greeks had a calendar, as did the ...
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1answer
464 views

What was the motivation for the Gregorian Calendar?

The Gregorian Calendar eventually replaced the Roman calendar at some point, I know this was something to do with the days not being quite accurate so specific days (I think equinox and solstice) were ...