en.wikipedia.org/wiki/Epoch_(reference_date)

There are at least six satellite navigation systems, all of which function by transmitting time signals. Of the ...

en.wikipedia.org/wiki/Time

According to the theory of relativity it depends on the observer's frame of reference. Time is considered as a fourth coordinate ...

time.gov

Daylight saving time ends Sunday November 4 at 2 a.m. (local time) Remember to set your clocks backward one hour. See the NIST DST page for details.

ell.stackexchange.com/questions/69820/reference-speech-and-event-time

b) He uses Now as his reference point (Reference Time) to look at the ... It involves three moments in time: speech time, reference time and ...

www.timeanddate.com/time/aboututc.html

At the time, Greenwich Mean Time (GMT) was chosen as the world's time standard. The reference line or starting point, the Prime Meridian, was determined to ...

gssc.esa.int/navipedia/index.php/Time_References

Jun 1, 2015 ... Nevertheless, as science and technology evolved, more precise uniform and well -defined time scales were needed. Several time references ...

link.springer.com/article/10.1007/s10988-011-9100-y

Dec 11, 2011 ... We offer a formal account of the English past tenses. We see the perfect as having reference time at speech time and the preterite as having ...

gssc.esa.int/navipedia/index.php/Precise_Time_Reference

Sep 16, 2018 ... GNSS technologies have a design dependence on accurate timing. The resolution of positioning equations depend on the accurate ...

plato.stanford.edu/entries/tense-aspect

Jan 7, 2014 ... Tense roughly means reference to the time at which events take place, or at which processes or states hold. English, for example, clearly ...