day

day

Non-SI unit accepted for use with SI

Name	Symbol	Quantity	SI units
day	d	time	86 400 s
The day, symbol d, is a non-SI unit of time accepted for use with the SI. One day is equal to 86 400 seconds.
Definition			Δν_Cs^-1
$1 \mspace{4mu} \text{d} = (86 \mspace{4mu} 400)(9 \mspace{4mu} 192 \mspace{4mu} 631 \mspace{4mu} 770) \mspace{6mu} \dfrac{1}{\Delta \nu _{Cs}}\\ \\ \\ 1 \mspace{4mu} \text{d} = 794 \mspace{4mu} 243 \mspace{4mu} 384 \mspace{4mu} 928 \mspace{4mu} 000 \mspace{6mu} {\Delta \nu _{Cs}}^{-1}$