Difference Between Dates and Optional Times
Times are in 00:00 to 24:00 Format
Start Date:   ±Y  M  D Start Time:   HH:MM:SS
: :
Calendar Mode:   Julian            Gregorian
End Date:   ±Y  M  D End Time:   HH:MM:SS
: : 
Calendar Mode = Gregorian


Start Date/Time   = 2025 September 17 Wed 00:00:00
Julian Date       = 2460935.5
Julian Day Number = 2460936

====================
2025       September

Su Mo Tu We Th Fr Sa
    1  2  3  4  5  6 
 7  8  9 10 11 12 13 
14 15 16 17 18 19 20 
21 22 23 24 25 26 27 
28 29 30
============================================================




End Date/Time     = 2025 September 17 Wed 00:00:00
Julian Date       = 2460935.5
Julian Day Number = 2460936

====================
2025       September

Su Mo Tu We Th Fr Sa
    1  2  3  4  5  6 
 7  8  9 10 11 12 13 
14 15 16 17 18 19 20 
21 22 23 24 25 26 27 
28 29 30
============================================================


DIFFERENCE BETWEEN THE DATES AND TIMES

= (JDend − JDstart) = 0 d
= 0 Gregorian yr
= 0d  00h 00m 00s
= 0d  00h 00m 00s
Jay Tanner - 2025
Download This PHP 7 Program: 10 kB - Difference Between Dates and Times