Julian Day Converter - Version 1.00 This utility can convert a gregorian date into julianday format/Modified Julian Day format and vice versa.The Julian Day Format counts the day since the 24thnovember -4713bc. The julian day format is often usedin the astronomical section to calculate for examplerises. This utility offers a fast and easyway toconvert a gregorian date information to a julian dayformat or modified julian day format. The ModifiedJulian Day (MJD), introduced by the SmithsonianAstrophysical Observatory in 1957 to record the orbitof Sputnik, is defined in terms of the Julian day. Itcount the days since the 17th november 1858. It definesfrom the JD value as follow MJD =JD-2400000