The julianday()
function takes a
value plus zero or more modifier values and returns a
floating-point value representing the number of days since noon,
Greenwich time, on November 24th, 4714 B.C. using the proleptic
Gregorian calendar. It is equivalent to the call timestring
strftime( '%J',
, except that timestring
, ...
)julianday()
returns a floating-point value,
while strftime( '%J', ... )
returns a text representation of an equivalent floating-point
value.