en.wikipedia.org/wiki/Day

A day is a unit of time. In common usage, it is either an interval equal to 24 hours or daytime, ... The unit of measurement "day", redefined in 1960 as 86 400 SI seconds and symbolized d, ... The life patterns of humans and many other species are related to Earth's solar day and the day-night cycle (see circadian rhythms).

www.rapidtables.com/calc/time/seconds-in-day.htm

Seconds in a day calculation. One day has 24 ... has 60 seconds, so: 1 day = (24 hours/day) × (60 minutes/hour) × (60 seconds/minute) = 86400 seconds/day ...

socratic.org/questions/how-many-seconds-are-in-a-24-hour-day

May 28, 2017 ... Well there are 60 seconds in a minute and 60 minutes in an hour and 24 hours in a day. Thus: 60⋅60⋅24=86,400 seconds in a day.

www.quora.com/How-many-seconds-are-there-in-a-day

60x60x24=86400 seconds ... 60x60x24=86400 seconds. ... How many times a day are the hands of a clock straight? What does 4 seconds after 5th second ...

www.funtrivia.com/askft/Question85585.html

How many seconds are there in a day - trivia question /questions answer / answers. ... link http://en.wikipedia.org/wiki/Day#Leap_seconds ...

www.reference.com/science/many-seconds-day-3f8895e99a57abc9

There are 86400 seconds in a day. This calculation is based on the conventional definition of the length of a day; for convenience, a day is defined as 24 hours.

www.unitjuggler.com/convert-time-from-day-to-s.html

Convert time units. Easily convert days to seconds, convert day to sec. . Many other converters available for free.